28656568 has 16 divisors (see below), whose sum is σ = 53788680. Its totient is φ = 14312928.

The previous prime is 28656491. The next prime is 28656571. The reversal of 28656568 is 86565682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11655 + ... + 13897.

Almost surely, 2^28656568 is an apocalyptic number.

It is an amenable number.

28656568 is a deficient number, since it is larger than the sum of its proper divisors (25132112).

28656568 is a wasteful number, since it uses less digits than its factorization.

28656568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846 (or 3842 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The square root of 28656568 is about 5353.1829783784. The cubic root of 28656568 is about 306.0140680163.

The spelling of 28656568 in words is "twenty-eight million, six hundred fifty-six thousand, five hundred sixty-eight".