8157889090 has 64 divisors (see below), whose sum is σ = 16522361856. Its totient is φ = 2877507072.

The previous prime is 8157889073. The next prime is 8157889099. The reversal of 8157889090 is 909887518.

8157889090 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (8157889099) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3565927 + ... + 3568213.

It is an arithmetic number, because the mean of its divisors is an integer number (258161904).

Almost surely, 2^8157889090 is an apocalyptic number.

8157889090 is an abundant number, since it is smaller than the sum of its proper divisors (8364472766).

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

8157889090 is a wasteful number, since it uses less digits than its factorization.

8157889090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523.

The product of its (nonzero) digits is 1451520, while the sum is 55.

The square root of 8157889090 is about 90321.0334861155. The cubic root of 8157889090 is about 2013.0718020288.

The spelling of 8157889090 in words is "eight billion, one hundred fifty-seven million, eight hundred eighty-nine thousand, ninety".