Fait général: 4387 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 4387 is an unremarkable number.
Culture générale: 4387 is an unremarkable number.
Date historique: January 4th is the day in 1976 that the Reavey and O'Dowd killings take place (part of The Troubles in Northern Ireland, United Kingdom).