Fatto generale: 48739 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 48739 is a boring number.
Trivia: 48739 is an unremarkable number.
Data storica: June 10th is the day in 1886 that Mount Tarawera in New Zealand erupts, killing 153 people and destroying the famous Pink and White Terraces.