870256 has 20 divisors (see below), whose sum is σ = 1705000. Its totient is φ = 430272.

The previous prime is 870253. The next prime is 870271. The reversal of 870256 is 652078.

870256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870253) 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, 1495 + ... + 1993.

It is an arithmetic number, because the mean of its divisors is an integer number (85250).

2⁸⁷⁰²⁵⁶ is an apocalyptic number.

870256 is the 499-th nonagonal number.

It is an amenable number.

870256 is a deficient number, since it is larger than the sum of its proper divisors (834744).

870256 is a wasteful number, since it uses less digits than its factorization.

870256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 870256 is about 932.8751256197. The cubic root of 870256 is about 95.4733896968.

The spelling of 870256 in words is "eight hundred seventy thousand, two hundred fifty-six".