869566172 has 12 divisors (see below), whose sum is σ = 1527399720. Its totient is φ = 433166256.

The previous prime is 869566153. The next prime is 869566199. The reversal of 869566172 is 271665968.

It is a super-2 number, since 2×869566172² = 1512290654973467168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 869566172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402998 + ... + 405149.

It is an arithmetic number, because the mean of its divisors is an integer number (127283310).

Almost surely, 2^869566172 is an apocalyptic number.

It is an amenable number.

869566172 is a deficient number, since it is larger than the sum of its proper divisors (657833548).

869566172 is a wasteful number, since it uses less digits than its factorization.

869566172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808420 (or 808418 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 869566172 is about 29488.4074171529. The cubic root of 869566172 is about 954.4815665155.

The spelling of 869566172 in words is "eight hundred sixty-nine million, five hundred sixty-six thousand, one hundred seventy-two".