256

256 = 2⁸. It is the smallest prime power of a prime power of a prime power of a prime.

256 is a square number: 16 x 16 = 256.

256 is the number of possible values that can be stored in a byte (8 bits).

256 is one of two fourth powers using the same digits: 4⁴ = 256 and 5⁴ = 625.

256 is the number of integer partitions of 29 into distinct parts.

256 is the number of drams in a pound.

Source: Numeropedia