870656812 has 48 divisors (see below), whose sum is σ = 1652120064. Its totient is φ = 400400000.

The previous prime is 870656807. The next prime is 870656851. The reversal of 870656812 is 218656078.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266187 + ... + 269437.

It is an arithmetic number, because the mean of its divisors is an integer number (34419168).

Almost surely, 2^870656812 is an apocalyptic number.

870656812 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

870656812 is a deficient number, since it is larger than the sum of its proper divisors (781463252).

870656812 is a wasteful number, since it uses less digits than its factorization.

870656812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390 (or 3388 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 870656812 is about 29506.8943130245. The cubic root of 870656812 is about 954.8804477410.

The spelling of 870656812 in words is "eight hundred seventy million, six hundred fifty-six thousand, eight hundred twelve".