Fait général: 47730 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 47730 is a boring number.
Culture générale: 47730 is an uninteresting number.
Date historique: September 5th is the day in 1991 that the current international treaty defending indigenous peoples, Indigenous and Tribal Peoples Convention, 1989, came into force.