9990328 has 16 divisors (see below), whose sum is σ = 18881280. Its totient is φ = 4955328.

The previous prime is 9990307. The next prime is 9990359. The reversal of 9990328 is 8230999.

It is a happy number.

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, 3901 + ... + 5932.

It is an arithmetic number, because the mean of its divisors is an integer number (1180080).

Almost surely, 2^9990328 is an apocalyptic number.

It is an amenable number.

9990328 is a deficient number, since it is larger than the sum of its proper divisors (8890952).

9990328 is a wasteful number, since it uses less digits than its factorization.

9990328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9966 (or 9962 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 9990328 is about 3160.7480127337. The cubic root of 9990328 is about 215.3739876232.

The spelling of 9990328 in words is "nine million, nine hundred ninety thousand, three hundred twenty-eight".