28643568 has 20 divisors (see below), whose sum is σ = 73996008. Its totient is φ = 9547840.

The previous prime is 28643557. The next prime is 28643599. The reversal of 28643568 is 86534682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298323 + ... + 298418.

Almost surely, 2^28643568 is an apocalyptic number.

It is an amenable number.

28643568 is an abundant number, since it is smaller than the sum of its proper divisors (45352440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28643568 is a wasteful number, since it uses less digits than its factorization.

28643568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596752 (or 596746 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 28643568 is about 5351.9686097734. The cubic root of 28643568 is about 305.9677867751.

The spelling of 28643568 in words is "twenty-eight million, six hundred forty-three thousand, five hundred sixty-eight".