Fatto generale: 748 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 748 is the number of 3×3 sliding puzzle positions that require exactly 12 moves to solve starting with the hole in a corner.
Trivia: 748 is an unremarkable number.
Data storica: January 17th is the day in 1929 that Popeye the Sailor Man, a cartoon character created by Elzie Segar, first appears in the Thimble Theatre comic strip.