Fatto matematico: 28474 is an uninteresting number.
Trivia: 28474 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: December 15th is the day in 2001 that the Leaning Tower of Pisa reopens after 11 years and $27,000,000 to fortify it, without fixing its famous lean.