870002856 has 80 divisors (see below), whose sum is σ = 2565103200. Its totient is φ = 274733856.

The previous prime is 870002851. The next prime is 870002869. The reversal of 870002856 is 658200078.

870002856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 870002856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870002851) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23020 + ... + 47643.

It is an arithmetic number, because the mean of its divisors is an integer number (32063790).

Almost surely, 2^870002856 is an apocalyptic number.

It is an amenable number.

870002856 is an abundant number, since it is smaller than the sum of its proper divisors (1695100344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

870002856 is a wasteful number, since it uses less digits than its factorization.

870002856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70700 (or 70687 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 870002856 is about 29495.8108211997. The cubic root of 870002856 is about 954.6413155527.

The spelling of 870002856 in words is "eight hundred seventy million, two thousand, eight hundred fifty-six".