685379892 has 12 divisors (see below), whose sum is σ = 1599219776. Its totient is φ = 228459960.

The previous prime is 685379879. The next prime is 685379909. The reversal of 685379892 is 298973586.

It is a tau number, because it is divible by the number of its divisors (12).

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, 28557484 + ... + 28557507.

Almost surely, 2^685379892 is an apocalyptic number.

It is an amenable number.

685379892 is an abundant number, since it is smaller than the sum of its proper divisors (913839884).

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

685379892 is a wasteful number, since it uses less digits than its factorization.

685379892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57114998 (or 57114996 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The square root of 685379892 is about 26179.7611142653. The cubic root of 685379892 is about 881.6789108941.

The spelling of 685379892 in words is "six hundred eighty-five million, three hundred seventy-nine thousand, eight hundred ninety-two".