684377764 has 24 divisors (see below), whose sum is σ = 1394584128. Its totient is φ = 287770080.

The previous prime is 684377747. The next prime is 684377773. The reversal of 684377764 is 467773486.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229102 + ... + 232069.

It is an arithmetic number, because the mean of its divisors is an integer number (58107672).

Almost surely, 2^684377764 is an apocalyptic number.

It is an amenable number.

684377764 is an abundant number, since it is smaller than the sum of its proper divisors (710206364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

684377764 is a wasteful number, since it uses less digits than its factorization.

684377764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461235 (or 461233 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 52.

The square root of 684377764 is about 26160.6147481285. The cubic root of 684377764 is about 881.2489857708.

The spelling of 684377764 in words is "six hundred eighty-four million, three hundred seventy-seven thousand, seven hundred sixty-four".