27985845 has 16 divisors (see below), whose sum is σ = 44910720. Its totient is φ = 14881344.

The previous prime is 27985823. The next prime is 27985849. The reversal of 27985845 is 54858972.

It is not a de Polignac number, because 27985845 - 2⁷ = 27985717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27985794 and 27985803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27985849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2787 + ... + 7983.

It is an arithmetic number, because the mean of its divisors is an integer number (2806920).

Almost surely, 2^27985845 is an apocalyptic number.

It is an amenable number.

27985845 is a deficient number, since it is larger than the sum of its proper divisors (16924875).

27985845 is a wasteful number, since it uses less digits than its factorization.

27985845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5564.

The product of its digits is 806400, while the sum is 48.

The square root of 27985845 is about 5290.1649312663. The cubic root of 27985845 is about 303.6077184232.

The spelling of 27985845 in words is "twenty-seven million, nine hundred eighty-five thousand, eight hundred forty-five".