28564616 has 16 divisors (see below), whose sum is σ = 54205200. Its totient is φ = 14109904.

The previous prime is 28564559. The next prime is 28564621. The reversal of 28564616 is 61646582.

It is a self number, because there is not a number n which added to its sum of digits gives 28564616.

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, 20846 + ... + 22173.

It is an arithmetic number, because the mean of its divisors is an integer number (3387825).

Almost surely, 2^28564616 is an apocalyptic number.

It is an amenable number.

28564616 is a deficient number, since it is larger than the sum of its proper divisors (25640584).

28564616 is a wasteful number, since it uses less digits than its factorization.

28564616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43108 (or 43104 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 28564616 is about 5344.5875425518. The cubic root of 28564616 is about 305.6864089143.

The spelling of 28564616 in words is "twenty-eight million, five hundred sixty-four thousand, six hundred sixteen".