9928920 has 64 divisors (see below), whose sum is σ = 30129120. Its totient is φ = 2617344.

The previous prime is 9928907. The next prime is 9928927. The reversal of 9928920 is 298299.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9928927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11214 + ... + 12066.

Almost surely, 2^9928920 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 9928920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15064560).

9928920 is an abundant number, since it is smaller than the sum of its proper divisors (20200200).

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

9928920 is a wasteful number, since it uses less digits than its factorization.

9928920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 960 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 9928920 is about 3151.0188828377. The cubic root of 9928920 is about 214.9317973682.

The spelling of 9928920 in words is "nine million, nine hundred twenty-eight thousand, nine hundred twenty".