Fait général: 28260 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 28260 is an unremarkable number.
Culture générale: 28260 is an uninteresting number.
Date historique: May 15th is the day in 392 that Emperor Valentinian II is assassinated while advancing into Gaul against the Frankish usurper Arbogast.