9928818 has 40 divisors (see below), whose sum is σ = 22442112. Its totient is φ = 3280824.

The previous prime is 9928813. The next prime is 9928843. The reversal of 9928818 is 8188299.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9928813) 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, 26871 + ... + 27237.

Almost surely, 2^9928818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9928818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11221056).

9928818 is an abundant number, since it is smaller than the sum of its proper divisors (12513294).

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

9928818 is a wasteful number, since it uses less digits than its factorization.

9928818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 539 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 9928818 is about 3151.0026975552. The cubic root of 9928818 is about 214.9310613661.

The spelling of 9928818 in words is "nine million, nine hundred twenty-eight thousand, eight hundred eighteen".