8728 has 8 divisors (see below), whose sum is σ = 16380. Its totient is φ = 4360.

The previous prime is 8719. The next prime is 8731. The reversal of 8728 is 8278.

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

It is a super-3 number, since 3×8728³ = 1994644333056, which contains 333 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

8728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538 + ... + 553.

2⁸⁷²⁸ is an apocalyptic number.

It is an amenable number.

8728 is a deficient number, since it is larger than the sum of its proper divisors (7652).

8728 is a wasteful number, since it uses less digits than its factorization.

8728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097 (or 1093 counting only the distinct ones).

The product of its digits is 896, while the sum is 25.

The square root of 8728 is about 93.4237657130. The cubic root of 8728 is about 20.5891418568.

The spelling of 8728 in words is "eight thousand, seven hundred twenty-eight".