Fatto generale: 2782 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2782 is the maximum value of n so that there exist 4 denominations of stamps so that every postage from 1 to n can be paid for with at most 19 stamps.
Trivia: 2782 is an unremarkable number.
Data storica: August 13th is the day in 1968 that Alexandros Panagoulis attempts to assassinate the Greek dictator Colonel Georgios Papadopoulos in Varkiza, Athens.