8718728 has 8 divisors (see below), whose sum is σ = 16347630. Its totient is φ = 4359360.

The previous prime is 8718727. The next prime is 8718733. The reversal of 8718728 is 8278178.

It can be written as a sum of positive squares in only one way, i.e., 8168164 + 550564 = 2858^2 + 742^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8718727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544913 + ... + 544928.

Almost surely, 2^8718728 is an apocalyptic number.

It is an amenable number.

8718728 is a deficient number, since it is larger than the sum of its proper divisors (7628902).

8718728 is a wasteful number, since it uses less digits than its factorization.

8718728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089847 (or 1089843 counting only the distinct ones).

The product of its digits is 50176, while the sum is 41.

The square root of 8718728 is about 2952.7492274150. The cubic root of 8718728 is about 205.8184846532.

The spelling of 8718728 in words is "eight million, seven hundred eighteen thousand, seven hundred twenty-eight".