8138927940 has 96 divisors (see below), whose sum is σ = 26773117056. Its totient is φ = 1821296640.

The previous prime is 8138927903. The next prime is 8138927941. The reversal of 8138927940 is 497298318.

It is not an unprimeable number, because it can be changed into a prime (8138927941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465717 + ... + 482876.

It is an arithmetic number, because the mean of its divisors is an integer number (278886636).

Almost surely, 2^8138927940 is an apocalyptic number.

It is an amenable number.

8138927940 is an abundant number, since it is smaller than the sum of its proper divisors (18634189116).

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

8138927940 is a wasteful number, since it uses less digits than its factorization.

8138927940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948629 (or 948627 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 8138927940 is about 90216.0071162540. The cubic root of 8138927940 is about 2011.5109502436.

The spelling of 8138927940 in words is "eight billion, one hundred thirty-eight million, nine hundred twenty-seven thousand, nine hundred forty".