9928899 has 10 divisors (see below), whose sum is σ = 14832180. Its totient is φ = 6619212.

The previous prime is 9928889. The next prime is 9928903. The reversal of 9928899 is 9988299.

It is a de Polignac number, because none of the positive numbers 2^k-9928899 is a prime.

9928899 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9928859) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 61209 + ... + 61370.

It is an arithmetic number, because the mean of its divisors is an integer number (1483218).

Almost surely, 2^9928899 is an apocalyptic number.

9928899 is a deficient number, since it is larger than the sum of its proper divisors (4903281).

9928899 is a wasteful number, since it uses less digits than its factorization.

9928899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122591 (or 122582 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The square root of 9928899 is about 3151.0155505805. The cubic root of 9928899 is about 214.9316458388.

The spelling of 9928899 in words is "nine million, nine hundred twenty-eight thousand, eight hundred ninety-nine".