684588704 has 24 divisors (see below), whose sum is σ = 1373217300. Its totient is φ = 335835136.

The previous prime is 684588701. The next prime is 684588739. The reversal of 684588704 is 407885486.

It can be written as a sum of positive squares in 2 ways, for example, as 578498704 + 106090000 = 24052^2 + 10300^2 .

It is not an unprimeable number, because it can be changed into a prime (684588701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200129 + ... + 203520.

Almost surely, 2^684588704 is an apocalyptic number.

It is an amenable number.

684588704 is an abundant number, since it is smaller than the sum of its proper divisors (688628596).

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

684588704 is a wasteful number, since it uses less digits than its factorization.

684588704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403712 (or 403704 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 50.

The square root of 684588704 is about 26164.6460706045. The cubic root of 684588704 is about 881.3395164571.

The spelling of 684588704 in words is "six hundred eighty-four million, five hundred eighty-eight thousand, seven hundred four".