870844 has 12 divisors (see below), whose sum is σ = 1641304. Its totient is φ = 401904.

The previous prime is 870833. The next prime is 870847. The reversal of 870844 is 448078.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8322 + ... + 8425.

2⁸⁷⁰⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

870844 is a deficient number, since it is larger than the sum of its proper divisors (770460).

870844 is a wasteful number, since it uses less digits than its factorization.

870844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16764 (or 16762 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 870844 is about 933.1902271241. The cubic root of 870844 is about 95.4948874761.

The spelling of 870844 in words is "eight hundred seventy thousand, eight hundred forty-four".