Fatto generale: 28170 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 28170 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 28170 is a boring number.
Data storica: February 14th is the day in 842 that Charles the Bald and Louis the German swear the Oaths of Strasbourg in the French and German languages.