9928730844 has 60 divisors (see below), whose sum is σ = 26091719808. Its totient is φ = 3292228800.

The previous prime is 9928730843. The next prime is 9928730857. The reversal of 9928730844 is 4480378299.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9928730843) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18337 + ... + 142104.

Almost surely, 2^9928730844 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 9928730844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13045859904).

9928730844 is an abundant number, since it is smaller than the sum of its proper divisors (16162988964).

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

9928730844 is a wasteful number, since it uses less digits than its factorization.

9928730844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160648 (or 160637 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The square root of 9928730844 is about 99643.0170358164. The cubic root of 9928730844 is about 2149.3043246993.

The spelling of 9928730844 in words is "nine billion, nine hundred twenty-eight million, seven hundred thirty thousand, eight hundred forty-four".