869638918 has 8 divisors (see below), whose sum is σ = 1304891280. Its totient is φ = 434675160.

The previous prime is 869638909. The next prime is 869638919. The reversal of 869638918 is 819836968.

869638918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869638919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64453 + ... + 76768.

It is an arithmetic number, because the mean of its divisors is an integer number (163111410).

Almost surely, 2^869638918 is an apocalyptic number.

869638918 is a deficient number, since it is larger than the sum of its proper divisors (435252362).

869638918 is a wasteful number, since it uses less digits than its factorization.

869638918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144302.

The product of its digits is 4478976, while the sum is 58.

The square root of 869638918 is about 29489.6408591220. The cubic root of 869638918 is about 954.5081823852.

The spelling of 869638918 in words is "eight hundred sixty-nine million, six hundred thirty-eight thousand, nine hundred eighteen".