Fait général: 2404 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 2404 is a boring number.
Culture générale: 2404 is a boring number.
Date historique: July 31st is the day in 1973 that a Delta Air Lines jetliner, flight DL 723 crashes while landing in fog at Logan Airport, Boston, Massachusetts killing 89.