Fatto matematico: 1920 is the smallest number that contains more different digits than its cube.
Trivia: 1920 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: April 3rd is the day in 1975 that Bobby Fischer refuses to play in a chess match against Anatoly Karpov, giving Karpov the title of World Champion by default.