Fatto matematico: 5629 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 16 stamps.
Trivia: 5629 is an unremarkable number.
Data storica: May 30th is the day in 1416 that the Council of Constance, called by the Emperor Sigismund, a supporter of Antipope John XXIII, burns Jerome of Prague following a trial for heresy.