Fait général: 4098 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 4098 is the number of subsets of the 26^{th} roots of unity that add to 1.
Culture générale: 4098 is an uninteresting number.
Date historique: March 21st is the day in 1946 that the Los Angeles Rams sign Kenny Washington, making him the first African American player in the American football since 1933.