General fact: 356 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 356 is the smallest happy number of height 6.
Trivia: 356 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: December 21st is the day in 1907 that the Chilean Army commits a massacre of at least 2,000 striking saltpeter miners in in Iquique, Chile.