764

764 = 2² x 191.

764 is a number that cannot be written as a sum of three squares.

764 is the number of 8 x 8 symmetric permutation matrices.

764 is the sum of three distinct positive cubes: 9³ + 3³ + 2³ = 764.

764 is the sum of seven positive fifth powers: 764 = 3⁵ + 3⁵ + 3⁵ + 2⁵ + 1⁵ + 1⁵ + 1⁵.

764-HERO was a rock band from Seattle, Washington.

Source: What's Special About This Number?