General fact: 1598 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 1598 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 1598 is an uninteresting number.
Historical date: May 16th is the day in 1966 that the Communist Party of China issues the "May 16 Notice", marking the beginning of the Cultural Revolution.