Hecho general: 8628 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 8628 is a boring number.
Trivia: 8628 is a boring number.
Fecha histórica: August 15th is the day in 1843 that Tivoli Gardens, one of the oldest still intact amusement parks in the world, opens in Copenhagen, Denmark.