8138605930 has 32 divisors (see below), whose sum is σ = 18030144384. Its totient is φ = 2575734336.

The previous prime is 8138605861. The next prime is 8138605931. The reversal of 8138605930 is 395068318.

It is not an unprimeable number, because it can be changed into a prime (8138605931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4470852 + ... + 4472671.

It is an arithmetic number, because the mean of its divisors is an integer number (563442012).

Almost surely, 2^8138605930 is an apocalyptic number.

8138605930 is an abundant number, since it is smaller than the sum of its proper divisors (9891538454).

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

8138605930 is a wasteful number, since it uses less digits than its factorization.

8138605930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8943550.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 8138605930 is about 90214.2224374849. Note that the first 3 decimals coincide. The cubic root of 8138605930 is about 2011.4844219675.

The spelling of 8138605930 in words is "eight billion, one hundred thirty-eight million, six hundred five thousand, nine hundred thirty".