870864 has 20 divisors (see below), whose sum is σ = 2249856. Its totient is φ = 290272.

The previous prime is 870853. The next prime is 870871. The reversal of 870864 is 468078.

It is a congruent number.

It is an unprimeable number.

870864 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, 9024 + ... + 9119.

2⁸⁷⁰⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

870864 is an abundant number, since it is smaller than the sum of its proper divisors (1378992).

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

870864 is a wasteful number, since it uses less digits than its factorization.

870864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18154 (or 18148 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 870864 is about 933.2009429914. The cubic root of 870864 is about 95.4956185229.

The spelling of 870864 in words is "eight hundred seventy thousand, eight hundred sixty-four".