Fait mathématique: 7894 is a value of n for which n and 8n together use each digit 1-9 exactly once.
Culture générale: 7894 is an uninteresting number.
Date historique: August 11th is the day in 1929 that Babe Ruth becomes the first baseball player to hit 500 home runs in his career with a home run at League Park in Cleveland, Ohio.