Fatto generale: 5724 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 5724 is a boring number.
Trivia: 5724 is a boring number.
Data storica: September 2nd is the day in 1898 that Battle of Omdurman – British and Egyptian troops defeat Sudanese tribesmen and establish British dominance in Sudan.