9989828 has 6 divisors (see below), whose sum is σ = 17482206. Its totient is φ = 4994912.

The previous prime is 9989827. The next prime is 9989849. The reversal of 9989828 is 8289899.

It can be written as a sum of positive squares in only one way, i.e., 9229444 + 760384 = 3038^2 + 872^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9989828.

It is not an unprimeable number, because it can be changed into a prime (9989827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1248725 + ... + 1248732.

It is an arithmetic number, because the mean of its divisors is an integer number (2913701).

Almost surely, 2^9989828 is an apocalyptic number.

It is an amenable number.

9989828 is a deficient number, since it is larger than the sum of its proper divisors (7492378).

9989828 is a wasteful number, since it uses less digits than its factorization.

9989828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497461 (or 2497459 counting only the distinct ones).

The product of its digits is 746496, while the sum is 53.

The square root of 9989828 is about 3160.6689165428. The cubic root of 9989828 is about 215.3703945216.

The spelling of 9989828 in words is "nine million, nine hundred eighty-nine thousand, eight hundred twenty-eight".