685692 has 48 divisors (see below), whose sum is σ = 2033920. Its totient is φ = 195696.

The previous prime is 685679. The next prime is 685697. The reversal of 685692 is 296586.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303 + ... + 1209.

2⁶⁸⁵⁶⁹² 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 685692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1016960).

685692 is an abundant number, since it is smaller than the sum of its proper divisors (1348228).

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

685692 is a wasteful number, since it uses less digits than its factorization.

685692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 919 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 685692 is about 828.0652148231. The cubic root of 685692 is about 88.1812723439.

The spelling of 685692 in words is "six hundred eighty-five thousand, six hundred ninety-two".