9928112724 has 18 divisors (see below), whose sum is σ = 25096062810. Its totient is φ = 3309370896.

The previous prime is 9928112713. The next prime is 9928112783. The reversal of 9928112724 is 4272118299.

It can be written as a sum of positive squares in only one way, i.e., 9914184900 + 13927824 = 99570^2 + 3732^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 9928112724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137890419 + ... + 137890490.

Almost surely, 2^9928112724 is an apocalyptic number.

It is an amenable number.

9928112724 is an abundant number, since it is smaller than the sum of its proper divisors (15167950086).

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

9928112724 is a wasteful number, since it uses less digits than its factorization.

9928112724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275780919 (or 275780914 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 9928112724 is about 99639.9153150985. The cubic root of 9928112724 is about 2149.2597216317.

The spelling of 9928112724 in words is "nine billion, nine hundred twenty-eight million, one hundred twelve thousand, seven hundred twenty-four".