Fatto generale: 48858 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 48858 is a boring number.
Trivia: 48858 is an unremarkable number.
Data storica: October 7th is the day in 1477 that Uppsala University is inaugurated after receiving its corporate rights from Pope Sixtus IV in February the same year.