Fatto matematico: 5228 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 5228 is an unremarkable number.
Data storica: April 24th is the day in 1918 that First tank-to-tank combat, at Villers-Bretonneux, France, when three British Mark IVs met three German A7Vs.