27785985 has 16 divisors (see below), whose sum is σ = 44573760. Its totient is φ = 14780480.

The previous prime is 27785983. The next prime is 27786061. The reversal of 27785985 is 58958772.

It is not a de Polignac number, because 27785985 - 2¹ = 27785983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27785983) 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, 4075 + ... + 8495.

It is an arithmetic number, because the mean of its divisors is an integer number (2785860).

Almost surely, 2^27785985 is an apocalyptic number.

It is an amenable number.

27785985 is a deficient number, since it is larger than the sum of its proper divisors (16787775).

27785985 is a wasteful number, since it uses less digits than its factorization.

27785985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4848.

The product of its digits is 1411200, while the sum is 51.

The square root of 27785985 is about 5271.2413149087. The cubic root of 27785985 is about 302.8832562266.

The spelling of 27785985 in words is "twenty-seven million, seven hundred eighty-five thousand, nine hundred eighty-five".