Fait général: 4502 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 4502 is the number of unit interval graphs with 10 vertices.
Culture générale: 4502 is an uninteresting number.
Date historique: April 28th is the day in 1977 that the Budapest Treaty on the International Recognition of the Deposit of Microorganisms for the Purposes of Patent Procedure is signed.