Fatto matematico: 9920 is the maximum number of regions a cube can be cut into with 39 cuts.
Trivia: 9920 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: February 27th is the day in 425 that the University of Constantinople is founded by Emperor Theodosius II at the urging of his wife Aelia Eudocia.