General fact: 290 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 290 is an uninteresting number.
Trivia: 290 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: October 16th is the day in 1843 that Sir William Rowan Hamilton comes up with the idea of quaternions, a non-commutative extension of complex numbers.