General fact: 28299 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 28299 is a boring number.
Trivia: 28299 is an unremarkable number.
Historical date: June 23rd is the day in 1894 that the International Olympic Committee is founded at the Sorbonne in Paris, at the initiative of Baron Pierre de Coubertin.