Fatto generale: 4280 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4280 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 4280 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: September 19th is the day in 1961 that Betty and Barney Hill claim that they saw a mysterious craft in the sky and that it tried to abduct them.