Hecho general: 2920 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 2920 is a heptagonal pyramidal number.
Trivia: 2920 is an uninteresting number.
Fecha histórica: December 29th is the day in 1812 that the USS Constitution under the command of Captain William Bainbridge, captures the HMS Java off the coast of Brazil after a three hour battle.