Fatto generale: 4498 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4498 is a value of n for which n, 2n, 3n, and 4n all use the same number of digits in Roman numerals.
Trivia: 4498 is a boring number.
Data storica: April 24th is the day in 1918 that First tank-to-tank combat, at Villers-Bretonneux, France, when three British Mark IVs met three German A7Vs.