27859 has 4 divisors (see below), whose sum is σ = 30016. Its totient is φ = 25704.

The previous prime is 27851. The next prime is 27883. The reversal of 27859 is 95872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27859 - 2³ = 27851 is a prime.

It is a super-2 number, since 2×27859² = 1552247762, which contains 22 as substring.

It is a Duffinian number.

27859 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 27859.

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 3 ways as a sum of consecutive naturals, for example, 1059 + ... + 1084.

It is an arithmetic number, because the mean of its divisors is an integer number (7504).

2²⁷⁸⁵⁹ is an apocalyptic number.

27859 is a deficient number, since it is larger than the sum of its proper divisors (2157).

27859 is a wasteful number, since it uses less digits than its factorization.

27859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156.

The product of its digits is 5040, while the sum is 31.

The square root of 27859 is about 166.9101554729. The cubic root of 27859 is about 30.3148326047.

The spelling of 27859 in words is "twenty-seven thousand, eight hundred fifty-nine".