8938440138 has 32 divisors (see below), whose sum is σ = 17958594240. Its totient is φ = 2965880960.

The previous prime is 8938440127. The next prime is 8938440151. The reversal of 8938440138 is 8310448398.

It is a Curzon 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, 3706153 + ... + 3708563.

It is an arithmetic number, because the mean of its divisors is an integer number (561206070).

Almost surely, 2^8938440138 is an apocalyptic number.

8938440138 is an abundant number, since it is smaller than the sum of its proper divisors (9020154102).

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

8938440138 is a wasteful number, since it uses less digits than its factorization.

8938440138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982.

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 8938440138 is about 94543.3241323786. The cubic root of 8938440138 is about 2075.3303882298.

The spelling of 8938440138 in words is "eight billion, nine hundred thirty-eight million, four hundred forty thousand, one hundred thirty-eight".