Fait général: 53840 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 53840 is an unremarkable number.
Culture générale: 53840 is a boring number.
Date historique: May 29th is the day in 1886 that Chemist John Pemberton places his first advertisement for Coca-Cola, the ad appearing in the Atlanta Journal.