684338904 has 24 divisors (see below), whose sum is σ = 1853418060. Its totient is φ = 228112944.

The previous prime is 684338899. The next prime is 684338917. The reversal of 684338904 is 409833486.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 684338904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4752282 + ... + 4752425.

Almost surely, 2^684338904 is an apocalyptic number.

It is an amenable number.

684338904 is an abundant number, since it is smaller than the sum of its proper divisors (1169079156).

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

684338904 is a wasteful number, since it uses less digits than its factorization.

684338904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9504719 (or 9504712 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 684338904 is about 26159.8720180356. The cubic root of 684338904 is about 881.2323059070.

The spelling of 684338904 in words is "six hundred eighty-four million, three hundred thirty-eight thousand, nine hundred four".