Fait mathématique: 9538 is a value of n for which 4n and 5n together use each digit exactly once.
Culture générale: 9538 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: February 10th is the day in 1989 that Ron Brown is elected chairman of the Democratic National Committee becoming the first African American to lead a major American political party.