9904728 has 32 divisors (see below), whose sum is σ = 24860160. Its totient is φ = 3288480.

The previous prime is 9904709. The next prime is 9904729. The reversal of 9904728 is 8274099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9904729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6801 + ... + 8127.

It is an arithmetic number, because the mean of its divisors is an integer number (776880).

Almost surely, 2^9904728 is an apocalyptic number.

It is an amenable number.

9904728 is an abundant number, since it is smaller than the sum of its proper divisors (14955432).

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

9904728 is a wasteful number, since it uses less digits than its factorization.

9904728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647 (or 1643 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 9904728 is about 3147.1777833481. The cubic root of 9904728 is about 214.7570936151.

The spelling of 9904728 in words is "nine million, nine hundred four thousand, seven hundred twenty-eight".