28556785 has 16 divisors (see below), whose sum is σ = 35447616. Its totient is φ = 22068288.

The previous prime is 28556779. The next prime is 28556809. The reversal of 28556785 is 58765582.

It is a cyclic number.

It is not a de Polignac number, because 28556785 - 2⁷ = 28556657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29682 + ... + 30628.

It is an arithmetic number, because the mean of its divisors is an integer number (2215476).

Almost surely, 2^28556785 is an apocalyptic number.

It is an amenable number.

28556785 is a deficient number, since it is larger than the sum of its proper divisors (6890831).

28556785 is a wasteful number, since it uses less digits than its factorization.

28556785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

The product of its digits is 672000, while the sum is 46.

The square root of 28556785 is about 5343.8548820117. The cubic root of 28556785 is about 305.6584716806.

The spelling of 28556785 in words is "twenty-eight million, five hundred fifty-six thousand, seven hundred eighty-five".