Mathematical fact: 268 is the smallest number whose product of digits is 6 times the sum of its digits.
Trivia: 268 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: September 24th is the day in 1852 that the first airship powered by (a steam) engine, created by Henri Giffard, travels 17 miles (27 km) from Paris to Trappes.