870636 has 24 divisors (see below), whose sum is σ = 2188144. Its totient is φ = 267840.

The previous prime is 870629. The next prime is 870641. The reversal of 870636 is 636078.

870636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2635 + ... + 2946.

2⁸⁷⁰⁶³⁶ is an apocalyptic number.

It is an amenable number.

870636 is an abundant number, since it is smaller than the sum of its proper divisors (1317508).

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

870636 is a wasteful number, since it uses less digits than its factorization.

870636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5601 (or 5599 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 870636 is about 933.0787748095. The cubic root of 870636 is about 95.4872839259.

The spelling of 870636 in words is "eight hundred seventy thousand, six hundred thirty-six".