Fatto generale: 782 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 782 is a number whose sum of divisors is a 4^{th} power.
Trivia: 782 is an uninteresting number.
Data storica: February 20th is the day in 1988 that the Nagorno-Karabakh Autonomous Oblast votes to secede from Azerbaijan and join Armenia, triggering the Nagorno-Karabakh War.