Hecho general: 28447 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 28447 is a boring number.
Trivia: 28447 is a boring number.
Fecha histórica: November 18th is the day in 1686 that Charles Francois Felix operates on King Louis XIV of France's anal fistula after practicing the surgery on several peasants.