Fait général: 47390 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 47390 is a boring number.
Culture générale: 47390 is a boring number.
Date historique: September 30th is the day in 1935 that the Hoover Dam, astride the border between the U.S. states of Arizona and Nevada, is dedicated.