Fatto generale: 28457 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 28457 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 28457 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: November 28th is the day in 1958 that Chad, the Republic of the Congo, and Gabon become autonomous republics within the French Community.