Fatto generale: 576 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 576 is the number of 4×4 Latin squares.
Trivia: 576 is an unremarkable number.
Data storica: July 29th is the day in 1907 that Sir Robert Baden Powell sets up the Brownsea Island Scout camp in Poole Harbour on the south coast of England.