870785871 has 16 divisors (see below), whose sum is σ = 1201858560. Its totient is φ = 560144480.

The previous prime is 870785857. The next prime is 870785891. The reversal of 870785871 is 178587078.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 870785871 - 2⁶ = 870785807 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870785821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223486 + ... + 227348.

It is an arithmetic number, because the mean of its divisors is an integer number (75116160).

Almost surely, 2^870785871 is an apocalyptic number.

870785871 is a deficient number, since it is larger than the sum of its proper divisors (331072689).

870785871 is a wasteful number, since it uses less digits than its factorization.

870785871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6486.

The product of its (nonzero) digits is 878080, while the sum is 51.

The square root of 870785871 is about 29509.0811615679. The cubic root of 870785871 is about 954.9276266161.

The spelling of 870785871 in words is "eight hundred seventy million, seven hundred eighty-five thousand, eight hundred seventy-one".