9990528 has 32 divisors (see below), whose sum is σ = 26538360. Its totient is φ = 3330048.

The previous prime is 9990499. The next prime is 9990551. The reversal of 9990528 is 8250999.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 9990528.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12625 + ... + 13392.

Almost surely, 2^9990528 is an apocalyptic number.

It is an amenable number.

9990528 is an abundant number, since it is smaller than the sum of its proper divisors (16547832).

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

9990528 is a wasteful number, since it uses less digits than its factorization.

9990528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26034 (or 26022 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 9990528 is about 3160.7796506558. The cubic root of 9990528 is about 215.3754248302.

The spelling of 9990528 in words is "nine million, nine hundred ninety thousand, five hundred twenty-eight".