Fatto matematico: 4422 is the maximum value of n so that there exist 5 denominations of stamps so that every postage from 1 to n can be paid for with at most 15 stamps.
Trivia: 4422 is an uninteresting number.
Data storica: February 8th is the day in 1915 that D.W. Griffith's controversial film The Birth of a Nation premieres in Los Angeles.