9928924840 has 96 divisors (see below), whose sum is σ = 23450139720. Its totient is φ = 3780767232.

The previous prime is 9928924813. The next prime is 9928924849. The reversal of 9928924840 is 484298299.

It can be written as a sum of positive squares in 4 ways, for example, as 9909406116 + 19518724 = 99546^2 + 4418^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9928924849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3267802 + ... + 3270838.

Almost surely, 2^9928924840 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 9928924840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11725069860).

9928924840 is an abundant number, since it is smaller than the sum of its proper divisors (13521214880).

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

9928924840 is a wasteful number, since it uses less digits than its factorization.

9928924840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179 (or 3128 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 55.

The square root of 9928924840 is about 99643.9904861302. The cubic root of 9928924840 is about 2149.3183229210.

The spelling of 9928924840 in words is "nine billion, nine hundred twenty-eight million, nine hundred twenty-four thousand, eight hundred forty".