Fait général: 2840 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 2840 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 2840 is a boring number.
Date historique: October 10th is the day in 1945 that the Chinese Communist Party and the Kuomintang signed a principle agreement in Chongqing about the future of post-war China.