Fait mathématique: 4098 is the number of subsets of the 26^{th} roots of unity that add to 1.
Culture générale: 4098 is a boring number.
Date historique: March 21st is the day in 1943 that Wehrmacht officer Rudolf Christoph Freiherr von Gersdorff plots to assassinate Adolf Hitler by using a suicide bomb, but the plan falls through.