Fatto generale: 8484 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 8484 is the reciprocal of the sum of the reciprocals of 13332 and its reverse.
Trivia: 8484 is an uninteresting number.
Data storica: March 24th is the day in 1934 that U.S. Congress passes the Tydings-McDuffie Act allowing the Philippines to become a self-governing commonwealth.