28685065 has 8 divisors (see below), whose sum is σ = 34907328. Its totient is φ = 22624560.

The previous prime is 28685057. The next prime is 28685077. The reversal of 28685065 is 56058682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28685065 - 2³ = 28685057 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40047 + ... + 40756.

It is an arithmetic number, because the mean of its divisors is an integer number (4363416).

Almost surely, 2^28685065 is an apocalyptic number.

It is an amenable number.

28685065 is a deficient number, since it is larger than the sum of its proper divisors (6222263).

28685065 is an equidigital number, since it uses as much as digits as its factorization.

28685065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80879.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 28685065 is about 5355.8440044497. The cubic root of 28685065 is about 306.1154711088.

The spelling of 28685065 in words is "twenty-eight million, six hundred eighty-five thousand, sixty-five".