320 = 26 x 5.
320 has a representation as the sum of two squares: 82 + 162 = 320.
320 is the maximum determinant of a 10 x 10 matrix of 0s and 1s.
320 is 500 in base 8.
There are 320 rods in a mile; 320 is also the number of fluid ounces in a peck.
Source: Number Gossip
