869665992 has 64 divisors (see below), whose sum is σ = 2367792000. Its totient is φ = 264574464.

The previous prime is 869665987. The next prime is 869666003. The reversal of 869665992 is 299566968.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12109 + ... + 43427.

It is an arithmetic number, because the mean of its divisors is an integer number (36996750).

Almost surely, 2^869665992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869665992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1183896000).

869665992 is an abundant number, since it is smaller than the sum of its proper divisors (1498126008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

869665992 is a wasteful number, since it uses less digits than its factorization.

869665992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31430 (or 31426 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 60.

The square root of 869665992 is about 29490.0998981014. The cubic root of 869665992 is about 954.5180876788.

The spelling of 869665992 in words is "eight hundred sixty-nine million, six hundred sixty-five thousand, nine hundred ninety-two".