Fait général: 6238 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 6238 is a boring number.
Culture générale: 6238 is an uninteresting number.
Date historique: January 28th is the day in 1909 that United States troops leave Cuba with the exception of Guantanamo Bay Naval Base after being there since the Spanish-American War.