Hecho general: 27540 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 27540 is an unremarkable number.
Trivia: 27540 is a boring number.
Fecha histórica: May 26th is the day in 1135 that Alfonso VII of León and Castile is crowned in the Cathedral of Leon as Imperator totius Hispaniae, "Emperor of all of Spain".