General fact: 47570 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 47570 is an uninteresting number.
Trivia: 47570 is an uninteresting number.
Historical date: March 29th is the day in 1990 that the Czechoslovak parliament is unable to reach an agreement on what to call the country after the fall of Communism, sparking the so-called Hyphen War.