Fatto generale: 946 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 946 is a hexagonal pyramidal number.
Trivia: 946 is an uninteresting number.
Data storica: August 3rd is the day in 1934 that Adolf Hitler becomes the supreme leader of Germany by joining the offices of President and Chancellor into Führer.