Fatto matematico: 2240 is the number of unsymmetrical ways to dissect a regular 13-gon into 11 triangles.
Trivia: 2240 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: February 17th is the day in 1871 that the victorious Prussian Army parades though Paris, France after the end of the Siege of Paris during the Franco-Prussian War.