8663728 has 10 divisors (see below), whose sum is σ = 16786004. Its totient is φ = 4331856.

The previous prime is 8663719. The next prime is 8663741. The reversal of 8663728 is 8273668.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270726 + ... + 270757.

Almost surely, 2^8663728 is an apocalyptic number.

It is an amenable number.

8663728 is a deficient number, since it is larger than the sum of its proper divisors (8122276).

8663728 is a wasteful number, since it uses less digits than its factorization.

8663728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541491 (or 541485 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 8663728 is about 2943.4211387431. The cubic root of 8663728 is about 205.3847859290.

The spelling of 8663728 in words is "eight million, six hundred sixty-three thousand, seven hundred twenty-eight".