Fait général: 84024 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 84024 is an unremarkable number.
Culture générale: 84024 is a boring number.
Date historique: January 18th is the day in 1778 that James Cook is the first known European to discover the Hawaiian Islands, which he names the "Sandwich Islands.