Fatto matematico: 7980 is the smallest number whose divisors contain every digit at least 7 times.
Trivia: 7980 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: November 5th is the day in 1916 that the Kingdom of Poland is proclaimed by the Act of November 5th of the emperors of Germany and Austria-Hungary.