General fact: 23778 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 23778 is a boring number.
Trivia: 23778 is an unremarkable number.
Historical date: February 5th is the day in 1576 that Henry of Navarre abjures Catholicism at Tours and rejoins the Protestant forces in the French Wars of Religion.