9928986 has 32 divisors (see below), whose sum is σ = 21161088. Its totient is φ = 3095040.

The previous prime is 9928981. The next prime is 9928999. The reversal of 9928986 is 6898299.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9928981) 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, 31566 + ... + 31878.

It is an arithmetic number, because the mean of its divisors is an integer number (661284).

Almost surely, 2^9928986 is an apocalyptic number.

9928986 is an abundant number, since it is smaller than the sum of its proper divisors (11232102).

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

9928986 is a wasteful number, since it uses less digits than its factorization.

9928986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its digits is 559872, while the sum is 51.

The square root of 9928986 is about 3151.0293556233. The cubic root of 9928986 is about 214.9322736022.

The spelling of 9928986 in words is "nine million, nine hundred twenty-eight thousand, nine hundred eighty-six".