Fatto generale: 28140 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 28140 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 28140 is an uninteresting number.
Data storica: January 15th is the day in 1962 that the Derveni papyrus, Europe's oldest surviving manuscript dating to 340 BC, is found in northern Greece.