Friday, May 29, 2009

404

404 = 22 x 101.

404 is a number that is the product of a prime and the square of a different prime.

The numbers 199989
394, 199989404 and 199989464 begin with the digits 394, 404, and 464 respectively.

404 has a representation as a sum of two squares: 404 = 202 + 22.

404 is the sum of seven positive fifth powers: 404 = 15 + 25 + 25 + 25 + 25 + 25 + 35.


404 is the HTTP status code for "file not found," perhaps the most famous HTTP status code.

Source:
Number Gossip
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