684969328 has 20 divisors (see below), whose sum is σ = 1372892040. Its totient is φ = 330674624.

The previous prime is 684969289. The next prime is 684969377. The reversal of 684969328 is 823969486.

It is a happy number.

684969328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737650 + ... + 738577.

It is an arithmetic number, because the mean of its divisors is an integer number (68644602).

Almost surely, 2^684969328 is an apocalyptic number.

It is an amenable number.

684969328 is an abundant number, since it is smaller than the sum of its proper divisors (687922712).

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

684969328 is a wasteful number, since it uses less digits than its factorization.

684969328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476264 (or 1476258 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 55.

The square root of 684969328 is about 26171.9186916053. The cubic root of 684969328 is about 881.5028246443.

The spelling of 684969328 in words is "six hundred eighty-four million, nine hundred sixty-nine thousand, three hundred twenty-eight".