Fatto generale: 2458 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2458 is a boring number.
Trivia: 2458 is an uninteresting number.
Data storica: September 23rd is the day in 1641 that the Merchant Royal, carrying a treasure worth over a billion US dollars, is lost at sea off Land's End.