Fait général: 2780 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 2780 is 1^{8} + 2^{7} + 3^{6} + 4^{5} + 5^{4} + 6^{3} + 7^{2} + 8^{1}.
Culture générale: 2780 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: August 11th is the day in 1858 that the Eiger in the Bernese Alps is ascended for the first time by Charles Barrington accompanied by Christian Almer and Peter Bohren.