Fatto generale: 4989 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4989 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 4989 is an unremarkable number.
Data storica: August 28th is the day in 489 that Theodoric, king of the Ostrogoths defeats Odoacer at the Battle of Isonzo, forcing his way into Italy.