Hecho matemático: 7880 is the maximum value of n so that there exist 4 denominations of stamps so that every postage from 1 to n can be paid for with at most 26 stamps.
Trivia: 7880 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: July 28th is the day in 2008 that the historic Grand Pier in Weston-super-Mare burns down for the second time in 80 years.