870638775 has 12 divisors (see below), whose sum is σ = 1439456232. Its totient is φ = 464340640.

The previous prime is 870638771. The next prime is 870638789. The reversal of 870638775 is 577836078.

It is not a de Polignac number, because 870638775 - 2² = 870638771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870638771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5804184 + ... + 5804333.

It is an arithmetic number, because the mean of its divisors is an integer number (119954686).

Almost surely, 2^870638775 is an apocalyptic number.

870638775 is a deficient number, since it is larger than the sum of its proper divisors (568817457).

870638775 is a wasteful number, since it uses less digits than its factorization.

870638775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11608530 (or 11608525 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 51.

The square root of 870638775 is about 29506.5886710070. The cubic root of 870638775 is about 954.8738537546.

The spelling of 870638775 in words is "eight hundred seventy million, six hundred thirty-eight thousand, seven hundred seventy-five".