Fatto generale: 5782 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 5782 is a boring number.
Trivia: 5782 is an unremarkable number.
Data storica: October 30th is the day in 1947 that the General Agreement on Tariffs and Trade (GATT), which is the foundation of the World Trade Organisation (WTO), is founded.