Hecho matemático: 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 a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: May 30th is the day in 1967 that the Nigerian Eastern Region declares independence as the Republic of Biafra, sparking a civil war.