8157989238 has 32 divisors (see below), whose sum is σ = 18663115776. Its totient is φ = 2328818688.

The previous prime is 8157989219. The next prime is 8157989243. The reversal of 8157989238 is 8329897518.

It is a congruent number.

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, 35806 + ... + 132657.

It is an arithmetic number, because the mean of its divisors is an integer number (583222368).

Almost surely, 2^8157989238 is an apocalyptic number.

8157989238 is an abundant number, since it is smaller than the sum of its proper divisors (10505126538).

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

8157989238 is a wasteful number, since it uses less digits than its factorization.

8157989238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169628.

The product of its digits is 8709120, while the sum is 60.

The square root of 8157989238 is about 90321.5878846248. The cubic root of 8157989238 is about 2013.0800396291.

The spelling of 8157989238 in words is "eight billion, one hundred fifty-seven million, nine hundred eighty-nine thousand, two hundred thirty-eight".