28083985 has 16 divisors (see below), whose sum is σ = 34951680. Its totient is φ = 21640320.

The previous prime is 28083961. The next prime is 28084013. The reversal of 28083985 is 58938082.

It is not a de Polignac number, because 28083985 - 2⁵ = 28083953 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 63174 + ... + 63616.

It is an arithmetic number, because the mean of its divisors is an integer number (2184480).

Almost surely, 2^28083985 is an apocalyptic number.

It is an amenable number.

28083985 is a deficient number, since it is larger than the sum of its proper divisors (6867695).

28083985 is a wasteful number, since it uses less digits than its factorization.

28083985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 28083985 is about 5299.4325167889. The cubic root of 28083985 is about 303.9621988143.

The spelling of 28083985 in words is "twenty-eight million, eighty-three thousand, nine hundred eighty-five".