Fait général: 28450 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 28450 is a boring number.
Culture générale: 28450 is an unremarkable number.
Date historique: November 21st is the day in 1386 that Timur of Samarkand captures and sacks the Georgian capital of Tbilisi, taking King Bagrat V of Georgia captive.