685931232 has 192 divisors, whose sum is σ = 2204858880. Its totient is φ = 182255616.

The previous prime is 685931161. The next prime is 685931243. The reversal of 685931232 is 232139586.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1107819 + ... + 1108437.

It is an arithmetic number, because the mean of its divisors is an integer number (11483640).

Almost surely, 2^685931232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685931232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1102429440).

685931232 is an abundant number, since it is smaller than the sum of its proper divisors (1518927648).

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

685931232 is a wasteful number, since it uses less digits than its factorization.

685931232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 745 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 685931232 is about 26190.2888872956. The cubic root of 685931232 is about 881.9152637883.

The spelling of 685931232 in words is "six hundred eighty-five million, nine hundred thirty-one thousand, two hundred thirty-two".