27218985 has 8 divisors (see below), whose sum is σ = 43550400. Its totient is φ = 14516784.

The previous prime is 27218977. The next prime is 27218987. The reversal of 27218985 is 58981272.

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

It is not a de Polignac number, because 27218985 - 2³ = 27218977 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (27218987) by changing a digit.

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, 907285 + ... + 907314.

It is an arithmetic number, because the mean of its divisors is an integer number (5443800).

Almost surely, 2^27218985 is an apocalyptic number.

It is an amenable number.

27218985 is a deficient number, since it is larger than the sum of its proper divisors (16331415).

27218985 is a wasteful number, since it uses less digits than its factorization.

27218985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814607.

The product of its digits is 80640, while the sum is 42.

The square root of 27218985 is about 5217.1817104640. The cubic root of 27218985 is about 300.8088726788.

It can be divided in two parts, 27218 and 985, that added together give a triangular number (28203 = T₂₃₇).

The spelling of 27218985 in words is "twenty-seven million, two hundred eighteen thousand, nine hundred eighty-five".