28180085 has 16 divisors (see below), whose sum is σ = 35085312. Its totient is φ = 21705600.

The previous prime is 28180063. The next prime is 28180091. The reversal of 28180085 is 58008182.

It is not a de Polignac number, because 28180085 - 2¹⁸ = 27917941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43232 + ... + 43878.

It is an arithmetic number, because the mean of its divisors is an integer number (2192832).

Almost surely, 2^28180085 is an apocalyptic number.

It is an amenable number.

28180085 is a deficient number, since it is larger than the sum of its proper divisors (6905227).

28180085 is a wasteful number, since it uses less digits than its factorization.

28180085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964.

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 28180085 is about 5308.4917820413. The cubic root of 28180085 is about 304.3085113946.

The spelling of 28180085 in words is "twenty-eight million, one hundred eighty thousand, eighty-five".