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 a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: February 8th is the day in 1989 that an Independent Air Boeing 707 crashes into Pico Alto mountain in the island of Santa Maria in the Azores, killing 144.