27986 has 8 divisors (see below), whose sum is σ = 48000. Its totient is φ = 11988.

The previous prime is 27983. The next prime is 27997. The reversal of 27986 is 68972.

27986 = 26² + 27² + ... + 46².

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

It is a nialpdrome in base 6 and base 8.

It is a zygodrome in base 6.

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 3 ways as a sum of consecutive naturals, for example, 986 + ... + 1013.

It is an arithmetic number, because the mean of its divisors is an integer number (6000).

2²⁷⁹⁸⁶ is an apocalyptic number.

27986 is a deficient number, since it is larger than the sum of its proper divisors (20014).

27986 is a wasteful number, since it uses less digits than its factorization.

27986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008.

The product of its digits is 6048, while the sum is 32.

The square root of 27986 is about 167.2901670751. The cubic root of 27986 is about 30.3608278934.

The spelling of 27986 in words is "twenty-seven thousand, nine hundred eighty-six".