Fait général: 6434 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 6434 is the number of divisors of the 18^{th} perfect number.
Culture générale: 6434 is a boring number.
Date historique: August 12th is the day in 1977 that the Sri Lankan riots of 1977, targeting the minority Sri Lankan Tamil people, begin, less than a month after the United National Party came to power.