general_fact: 40438 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 40438 is an uninteresting number.
trivia: 40438 is an uninteresting number.
historical_date: September 18th is the day in 2007 that Buddhist monks join anti-government protesters in Myanmar, starting what some called the Saffron Revolution.