454

454 = 2 x 227.

454 is the largest number known that cannot be written as a sum of seven or fewer cubes (A018889).

454 is a Smith number (A006753). The sum of its digits (4 + 5 + 4 = 13) is equal to the sum of the digits of its prime factors (2 + 2 + 2 + 7 = 13).

1 + 8 + 10 + 17 = 36 = 2 + 5 + 13 + 16
1² + 8² + 10² + 17² = 454 = 2² + 5² + 13² + 16²
1³ + 8³ + 10³ + 17³ = 6426 = 2³ + 5³ + 13³ + 16<sup>3

454 is 383 in base 11 (A029966) and 246 in base 14.</sup>

Source: What's Special About This Number?