27989255 has 16 divisors (see below), whose sum is σ = 38507520. Its totient is φ = 19131552.

The previous prime is 27989251. The next prime is 27989287. The reversal of 27989255 is 55298972.

It is a cyclic number.

It is not a de Polignac number, because 27989255 - 2² = 27989251 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27989251) 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, 11756 + ... + 13934.

It is an arithmetic number, because the mean of its divisors is an integer number (2406720).

Almost surely, 2^27989255 is an apocalyptic number.

27989255 is a deficient number, since it is larger than the sum of its proper divisors (10518265).

27989255 is a wasteful number, since it uses less digits than its factorization.

27989255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558.

The product of its digits is 453600, while the sum is 47.

The square root of 27989255 is about 5290.4872176388. The cubic root of 27989255 is about 303.6200491839.

The spelling of 27989255 in words is "twenty-seven million, nine hundred eighty-nine thousand, two hundred fifty-five".