Fait mathématique: 2784 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 2784 is an unremarkable number.
Date historique: August 15th is the day in 1984 that the PKK in Turkey starts a campaign of armed attacks upon the Turkish military with an attack on police and gendarmerie bases in Şemdinli and Eruh.