685632 has 28 divisors (see below), whose sum is σ = 1814576. Its totient is φ = 228480.

The previous prime is 685631. The next prime is 685637. The reversal of 685632 is 236586.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 685632.

It is not an unprimeable number, because it can be changed into a prime (685631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1594 + ... + 1977.

2⁶⁸⁵⁶³² is an apocalyptic number.

It is an amenable number.

685632 is an abundant number, since it is smaller than the sum of its proper divisors (1128944).

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

685632 is a wasteful number, since it uses less digits than its factorization.

685632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3586 (or 3576 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 685632 is about 828.0289849999. The cubic root of 685632 is about 88.1787002315.

The spelling of 685632 in words is "six hundred eighty-five thousand, six hundred thirty-two".