874

874 = 2 x 19 x 23.

874 is a heptagonal number.

874 is the number of positive integer solutions to (1 + 1/a)(1 + 1/b)(1 + 1/c)(1 + 1/d)(1 + 1/e) = 2.

874 = 0! + 1! + 2! + 3! + 4! + 5! + 6!

874² = 763876 = (7 - 6 - 3 + 876)²

USS Duncan (DDR 874) was a U.S. Navy destroyer, launched in 1945.

Source: What's Special About This Number?