7909938180 has 144 divisors (see below), whose sum is σ = 24627867264. Its totient is φ = 2054277120.

The previous prime is 7909938163. The next prime is 7909938209. The reversal of 7909938180 is 818399097.

It is a super-2 number, since 2×7909938180² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1057012 + ... + 1064468.

It is an arithmetic number, because the mean of its divisors is an integer number (171026856).

Almost surely, 2^7909938180 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7909938180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12313933632).

7909938180 is an abundant number, since it is smaller than the sum of its proper divisors (16717929084).

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

7909938180 is a wasteful number, since it uses less digits than its factorization.

7909938180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7626 (or 7621 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 7909938180 is about 88937.8332319829. The cubic root of 7909938180 is about 1992.4665072058.

The spelling of 7909938180 in words is "seven billion, nine hundred nine million, nine hundred thirty-eight thousand, one hundred eighty".