685732 has 12 divisors (see below), whose sum is σ = 1206576. Its totient is φ = 341000.

The previous prime is 685723. The next prime is 685733. The reversal of 685732 is 237586.

685732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 685694 and 685703.

It is not an unprimeable number, because it can be changed into a prime (685733) by changing a digit.

685732 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663 + ... + 1345.

It is an arithmetic number, because the mean of its divisors is an integer number (100548).

2⁶⁸⁵⁷³² is an apocalyptic number.

It is an amenable number.

685732 is a deficient number, since it is larger than the sum of its proper divisors (520844).

685732 is a wasteful number, since it uses less digits than its factorization.

685732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 936 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 685732 is about 828.0893671579. The cubic root of 685732 is about 88.1829870021.

It can be divided in two parts, 6857 and 32, that added together give a square (6889 = 83²).

The spelling of 685732 in words is "six hundred eighty-five thousand, seven hundred thirty-two".