869747656 has 64 divisors (see below), whose sum is σ = 1725235200. Its totient is φ = 410529600.

The previous prime is 869747647. The next prime is 869747731. The reversal of 869747656 is 656747968.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 869747656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2017761 + ... + 2018191.

It is an arithmetic number, because the mean of its divisors is an integer number (26956800).

Almost surely, 2^869747656 is an apocalyptic number.

It is an amenable number.

869747656 is a deficient number, since it is larger than the sum of its proper divisors (855487544).

869747656 is a wasteful number, since it uses less digits than its factorization.

869747656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 646 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 58.

The square root of 869747656 is about 29491.4844658590. The cubic root of 869747656 is about 954.5479640245.

The spelling of 869747656 in words is "eight hundred sixty-nine million, seven hundred forty-seven thousand, six hundred fifty-six".