870812 has 12 divisors (see below), whose sum is σ = 1576680. Its totient is φ = 420336.

The previous prime is 870811. The next prime is 870823. The reversal of 870812 is 218078.

870812 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 (870811) 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, 3638 + ... + 3869.

It is an arithmetic number, because the mean of its divisors is an integer number (131390).

2⁸⁷⁰⁸¹² is an apocalyptic number.

It is an amenable number.

870812 is a deficient number, since it is larger than the sum of its proper divisors (705868).

870812 is a wasteful number, since it uses less digits than its factorization.

870812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7540 (or 7538 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 870812 is about 933.1730814806. The cubic root of 870812 is about 95.4937177780.

The spelling of 870812 in words is "eight hundred seventy thousand, eight hundred twelve".