8139493236 has 48 divisors (see below), whose sum is σ = 21714108416. Its totient is φ = 2324627424.

The previous prime is 8139493231. The next prime is 8139493261. The reversal of 8139493236 is 6323949318.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8139493231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204045 + ... + 240651.

Almost surely, 2^8139493236 is an apocalyptic number.

It is an amenable number.

8139493236 is an abundant number, since it is smaller than the sum of its proper divisors (13574615180).

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

8139493236 is a wasteful number, since it uses less digits than its factorization.

8139493236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39268 (or 39266 counting only the distinct ones).

The product of its digits is 839808, while the sum is 48.

The square root of 8139493236 is about 90219.1400757068. The cubic root of 8139493236 is about 2011.5575195534.

The spelling of 8139493236 in words is "eight billion, one hundred thirty-nine million, four hundred ninety-three thousand, two hundred thirty-six".