9989028 has 96 divisors (see below), whose sum is σ = 30168320. Its totient is φ = 2799360.

The previous prime is 9989027. The next prime is 9989039. The reversal of 9989028 is 8209899.

It is not an unprimeable number, because it can be changed into a prime (9989027) 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 in 31 ways as a sum of consecutive naturals, for example, 55098 + ... + 55278.

Almost surely, 2^9989028 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 9989028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15084160).

9989028 is an abundant number, since it is smaller than the sum of its proper divisors (20179292).

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

9989028 is a wasteful number, since it uses less digits than its factorization.

9989028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 9989028 is about 3160.5423585201. The cubic root of 9989028 is about 215.3646453096.

The spelling of 9989028 in words is "nine million, nine hundred eighty-nine thousand, twenty-eight".