8186589138 has 128 divisors (see below), whose sum is σ = 20742511104. Its totient is φ = 2096640000.

The previous prime is 8186589127. The next prime is 8186589167. The reversal of 8186589138 is 8319856818.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2921338 + ... + 2924138.

It is an arithmetic number, because the mean of its divisors is an integer number (162050868).

Almost surely, 2^8186589138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8186589138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10371255552).

8186589138 is an abundant number, since it is smaller than the sum of its proper divisors (12555921966).

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

8186589138 is a wasteful number, since it uses less digits than its factorization.

8186589138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980.

The product of its digits is 3317760, while the sum is 57.

The square root of 8186589138 is about 90479.7719824713. The cubic root of 8186589138 is about 2015.4297501164.

The spelling of 8186589138 in words is "eight billion, one hundred eighty-six million, five hundred eighty-nine thousand, one hundred thirty-eight".