400 (number)

Mathematical properties

Integers from 401 to 499

400s

401

• Eisenstein prime with no imaginary part
• Sum of seven consecutive primes
• Sum of nine consecutive primes
• Mertens function returns 0,
• Member of the Mian–Chowla sequence.

  402

• HTTP status code for "Payment Required".
• The area code for Nebraska.

  403

• First number that is the product of an emirp pair.
• HTTP 403, the status code for "Forbidden"
• Also in the name of a retirement plan in the United States, 403.
• The area code for southern Alberta.

  404

• The HTTP 404 status code is usually sent from a web page if a user attempts to reach a broken or dead link. It has since become one of the most commonly reached, and thus most recognizable errors on the World Wide Web.
• One of the four area codes of the Atlanta calling area.

  405

• HTTP status code for "Method Not Allowed".
• Area code for central Oklahoma, including Oklahoma City and surrounding suburbs.
• Interstate 405 is a major, heavily traveled freeway in Southern California, known to the local as "The 405".
• Sum of all numbers in a standard x Sudoku.

  406

• HTTP status code for "Not Acceptable".
• 406 is a poem by John Boyle O'Reilly. It was believed to have been the number of one of O'Reilly's prison cells, and was the number of his first hotel room after he arrived in the United States. Hence the number had a mystical significance to him, as intimated in the poem.
• Peugeot 406 car.
• Area code for all of Montana.

  407

• Sum of cubes of 4, 0 and 7 ; narcissistic number
• Sum of three consecutive primes
• Mertens function returns 0
• Harshad number
• Lazy caterer number
• HTTP status code for "Proxy Authentication Required"
• Area code for Orlando, Florida
• Colloquial name for the Express Toll Route in Ontario

  408

• Sum of four consecutive primes
• Sum of eight consecutive primes
• Pell number
• Mertens function returns 0
• Octagonal number
• Untouchable number
• Harshad number
• HTTP status code for "Request Timeout"
• Area code for the Silicon Valley

  409

• A family of cleaning products, Formula 409
• An engine known as the Chevrolet 409, a 409 cubic inch W-series V8.
• The song "409" by The Beach Boys, inspired by the above engine
• HTTP status code for "Conflict"
• A Green Day song, "409 in Your Coffeemaker", included on their album 1,039/Smoothed Out Slappy Hours
• The area code for the corner of southeastern Texas
• Venice has 409 bridges.
• A Bullet For My Valentine song, "Room 409", from the album The Poison
• Joe Paterno holds the record as the winningest head coach in NCAA FBS with 409 victories.

  410s

410

• HTTP status code for "Gone".
• Area Code 410, a telephone area code for the US State of Maryland, representing portions of the state including the Baltimore metropolitan area and the Eastern Shore.

  411

• HTTP status code for "Length Required", slang for information
• The number of possible FM broadcasting frequencies between 87.50 and 108.00 MHz in 50 kHz spacing countries

  412

• HTTP status code for "Precondition Failed"
• Area code for Pittsburgh, Pennsylvania.
• Fictitious Police Code for "Overacting" from "" - Stan Freberg

  413

• HTTP status code for "Request Entity Too Large"
• Area code for Western Massachusetts.
• An important and recurring number in the webcomic Homestuck by Andrew Hussie.

  414

• HTTP status code for "Request-URI Too Long"
• Area code for Milwaukee, Wisconsin.
• The 414s, a group of hackers from Milwaukee, Wisconsin.

  415

• HTTP status code for "Unsupported Media Type"
• 415 Records, a record label
• 415 refers to California Penal Code, section 415, pertaining to public fighting, public disturbance, and public use of offensive words likely to provoke an immediate violent reaction.
• Area code 415, a telephone area code for San Francisco, California

  416

• HTTP status code for "Requested Range Not Satisfiable"
• 416 is also a nickname for the city of Toronto, based on the area code it used before overlay plans added two more area codes.

  417

• HTTP status code for "Expectation Failed". Also the area code for southwestern Missouri, including Springfield, and Joplin.

  418

• The sum of the integers between 13 and 31, inclusive.
• The product of its digits as well as the sum of its prime factors are both 32. Also, 131, a strong concatenation of 13 and 31, is the 32nd prime number.
• The sum of the 84 digits of the 22nd unique prime in decimal.
• The number of Abrahadabra
• Hyper Text Coffee Pot Control Protocol status code for "Teapot" as an April Fools' joke.

  419

• Refers to the Nigerian advance-fee scam scheme
• The Area Code for Toledo, OH and other surrounding areas.

  420s

420

421

• A prime number, sum of five consecutive primes, centered square number, also SMTP code meaning the transmission channel will be closing
• Country calling code for Slovakia

  422

423

• Country calling code for Liechtenstein

  424

425

• 425 is an area code in Washington State.

  426

427

428

• 428: Shibuya Scramble, a video game

  429

430s

430

431

• It is also the fourth Leyland prime of the second kind.
• Area code 431 is a telephone area code for Manitoba, Canada.

  432

433

• The perfect score in the game show Fifteen To One, only ever achieved once in over 2000 shows.
• 433 can refer to composer John Cage's composition 4′33″.

  434

435

• The number of members in the US House of Representatives.

  436

437

438

• The "438 match" or "438 game" has been used by cricket media to describe the famous 2006 One Day International in which Australia scored a world record 434 in their innings, only to see South Africa respond in their innings with 438.