870885 has 16 divisors (see below), whose sum is σ = 1548480. Its totient is φ = 464400.

The previous prime is 870871. The next prime is 870889. The reversal of 870885 is 588078.

It is not a de Polignac number, because 870885 - 2⁵ = 870853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870889) 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 15 ways as a sum of consecutive naturals, for example, 3091 + ... + 3360.

It is an arithmetic number, because the mean of its divisors is an integer number (96780).

2⁸⁷⁰⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

870885 is a deficient number, since it is larger than the sum of its proper divisors (677595).

870885 is a wasteful number, since it uses less digits than its factorization.

870885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6465 (or 6459 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 870885 is about 933.2121945196. The cubic root of 870885 is about 95.4963861100.

The spelling of 870885 in words is "eight hundred seventy thousand, eight hundred eighty-five".