8664728 has 16 divisors (see below), whose sum is σ = 16277760. Its totient is φ = 4324000.

The previous prime is 8664701. The next prime is 8664731. The reversal of 8664728 is 8274668.

It is a super-2 number, since 2×8664728² = 150155022627968, which contains 22 as substring.

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, 6953 + ... + 8103.

It is an arithmetic number, because the mean of its divisors is an integer number (1017360).

Almost surely, 2^8664728 is an apocalyptic number.

It is an amenable number.

8664728 is a deficient number, since it is larger than the sum of its proper divisors (7613032).

8664728 is a wasteful number, since it uses less digits than its factorization.

8664728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098 (or 2094 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 8664728 is about 2943.5910041988. The cubic root of 8664728 is about 205.3926877193.

The spelling of 8664728 in words is "eight million, six hundred sixty-four thousand, seven hundred twenty-eight".