27987 has 8 divisors (see below), whose sum is σ = 39360. Its totient is φ = 17640.

The previous prime is 27983. The next prime is 27997. The reversal of 27987 is 78972.

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

It is not a de Polignac number, because 27987 - 2² = 27983 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 27987.

It is not an unprimeable number, because it can be changed into a prime (27983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189 + ... + 302.

It is an arithmetic number, because the mean of its divisors is an integer number (4920).

2²⁷⁹⁸⁷ is an apocalyptic number.

27987 is a deficient number, since it is larger than the sum of its proper divisors (11373).

27987 is a wasteful number, since it uses less digits than its factorization.

27987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513.

The product of its digits is 7056, while the sum is 33.

The square root of 27987 is about 167.2931558672. The cubic root of 27987 is about 30.3611895083.

The spelling of 27987 in words is "twenty-seven thousand, nine hundred eighty-seven".