8997728 has 24 divisors (see below), whose sum is σ = 17790192. Its totient is φ = 4479616.

The previous prime is 8997721. The next prime is 8997733. The reversal of 8997728 is 8277998.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8997721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9701 + ... + 10587.

It is an arithmetic number, because the mean of its divisors is an integer number (741258).

Almost surely, 2^8997728 is an apocalyptic number.

It is an amenable number.

8997728 is a deficient number, since it is larger than the sum of its proper divisors (8792464).

8997728 is a wasteful number, since it uses less digits than its factorization.

8997728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1206 counting only the distinct ones).

The product of its digits is 508032, while the sum is 50.

The square root of 8997728 is about 2999.6213094322. The cubic root of 8997728 is about 207.9908773119.

The spelling of 8997728 in words is "eight million, nine hundred ninety-seven thousand, seven hundred twenty-eight".