7975728108 has 72 divisors (see below), whose sum is σ = 20608844256. Its totient is φ = 2599833600.

The previous prime is 7975728091. The next prime is 7975728119. The reversal of 7975728108 is 8018275797.

It is a happy number.

It is a super-2 number, since 2×7975728108² (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 23 ways as a sum of consecutive naturals, for example, 586668 + ... + 600108.

It is an arithmetic number, because the mean of its divisors is an integer number (286233948).

Almost surely, 2^7975728108 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 7975728108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10304422128).

7975728108 is an abundant number, since it is smaller than the sum of its proper divisors (12633116148).

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

7975728108 is a wasteful number, since it uses less digits than its factorization.

7975728108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13815 (or 13810 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 54.

The square root of 7975728108 is about 89306.9320265790. The cubic root of 7975728108 is about 1997.9752933064.

The spelling of 7975728108 in words is "seven billion, nine hundred seventy-five million, seven hundred twenty-eight thousand, one hundred eight".