Mathematical fact: 9038 is the number of conjugacy classes of the alternating group A_{36}.
Trivia: 9038 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: September 28th is the day in 1958 that France ratifies a new Constitution of France; the French Fifth Republic is then formed upon the formal adoption of the new constitution on October 4.