Fatto generale: 50898 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 50898 is a boring number.
Trivia: 50898 is an uninteresting number.
Data storica: May 9th is the day in 1671 that Thomas Blood, disguised as a clergyman, attempts to steal England's Crown Jewels from the Tower of London.