Fatto matematico: 43889 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 43889 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: February 29th is the day in 1712 that February 29 is followed by February 30 in Sweden, in a move to abolish the Swedish calendar for a return to the Old style.