General fact: 36404 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 36404 is a boring number.
Trivia: 36404 is an unremarkable number.
Historical date: September 2nd is the day in 1991 that Nagorno Karabakh declares its independence from Azerbaijan forming the Nagorno-Karabakh Republic.