872165790 has 48 divisors (see below), whose sum is σ = 2401025328. Its totient is φ = 218896128.

The previous prime is 872165779. The next prime is 872165809. The reversal of 872165790 is 97561278.

872165790 is a `hidden beast` number, since 8 + 72 + 1 + 6 + 579 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 283492 + ... + 286551.

It is an arithmetic number, because the mean of its divisors is an integer number (50021361).

Almost surely, 2^872165790 is an apocalyptic number.

872165790 is an abundant number, since it is smaller than the sum of its proper divisors (1528859538).

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

872165790 is a wasteful number, since it uses less digits than its factorization.

872165790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570073 (or 570070 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 872165790 is about 29532.4531659664. The cubic root of 872165790 is about 955.4317793875.

The spelling of 872165790 in words is "eight hundred seventy-two million, one hundred sixty-five thousand, seven hundred ninety".