28039568 has 20 divisors (see below), whose sum is σ = 54758400. Its totient is φ = 13908384.

The previous prime is 28039559. The next prime is 28039591. The reversal of 28039568 is 86593082.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 4868 + ... + 8931.

It is an arithmetic number, because the mean of its divisors is an integer number (2737920).

Almost surely, 2^28039568 is an apocalyptic number.

It is an amenable number.

28039568 is a deficient number, since it is larger than the sum of its proper divisors (26718832).

28039568 is a wasteful number, since it uses less digits than its factorization.

28039568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13934 (or 13928 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 28039568 is about 5295.2401267553. The cubic root of 28039568 is about 303.8018676633.

The spelling of 28039568 in words is "twenty-eight million, thirty-nine thousand, five hundred sixty-eight".