8139879930 has 192 divisors, whose sum is σ = 24312987648. Its totient is φ = 1707713280.

The previous prime is 8139879911. The next prime is 8139879941. The reversal of 8139879930 is 399789318.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7487847 + ... + 7488933.

It is an arithmetic number, because the mean of its divisors is an integer number (126630144).

Almost surely, 2^8139879930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8139879930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12156493824).

8139879930 is an abundant number, since it is smaller than the sum of its proper divisors (16173107718).

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

8139879930 is a wasteful number, since it uses less digits than its factorization.

8139879930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 57.

The square root of 8139879930 is about 90221.2831320859. The cubic root of 8139879930 is about 2011.5893743173.

The spelling of 8139879930 in words is "eight billion, one hundred thirty-nine million, eight hundred seventy-nine thousand, nine hundred thirty".