Fatto generale: 2769 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2769 is a value of n for which n and 5n together use each digit 1-9 exactly once.
Trivia: 2769 is an unremarkable number.
Data storica: July 31st is the day in 1940 that a doodlebug train in Cuyahoga Falls, Ohio collides with a multi-car freight train heading in the opposite direction, killing 43 people.