27855 has 12 divisors (see below), whose sum is σ = 48360. Its totient is φ = 14832.

The previous prime is 27851. The next prime is 27883. The reversal of 27855 is 55872.

It is a happy number.

It is not a de Polignac number, because 27855 - 2² = 27851 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

27855 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 265 + ... + 354.

It is an arithmetic number, because the mean of its divisors is an integer number (4030).

2²⁷⁸⁵⁵ is an apocalyptic number.

27855 is a deficient number, since it is larger than the sum of its proper divisors (20505).

27855 is a wasteful number, since it uses less digits than its factorization.

27855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 627 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 27855 is about 166.8981725484. The cubic root of 27855 is about 30.3133816656.

It can be divided in two parts, 278 and 55, that added together give a palindrome (333).

The spelling of 27855 in words is "twenty-seven thousand, eight hundred fifty-five".