880

880 = 2⁴ x 5 x 11.

880 is a heptagonal pyramidal number.

880 is the number of 4 x 4 magic squares.

880 is a number that can't be represented as a sum of three squares.

880 is 1177 in base 9.

880 Herba is an asteroid discovered in 1917.

Source: Number Gossip