Fait mathématique: 4284 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 4284 is a boring number.
Date historique: September 23rd is the day in 1889 that Nintendo Koppai (Later Nintendo Company, Limited) is founded by Fusajiro Yamauchi to produce and market the playing card game Hanafuda.