27287 has 4 divisors (see below), whose sum is σ = 29400. Its totient is φ = 25176.

The previous prime is 27283. The next prime is 27299. The reversal of 27287 is 78272.

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 27287 - 2² = 27283 is a prime.

It is a Duffinian number.

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 27287.

It is not an unprimeable number, because it can be changed into a prime (27281) 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, 1037 + ... + 1062.

It is an arithmetic number, because the mean of its divisors is an integer number (7350).

2²⁷²⁸⁷ is an apocalyptic number.

27287 is a deficient number, since it is larger than the sum of its proper divisors (2113).

27287 is a wasteful number, since it uses less digits than its factorization.

27287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112.

The product of its digits is 1568, while the sum is 26.

The square root of 27287 is about 165.1877719445. The cubic root of 27287 is about 30.1059218747.

Subtracting from 27287 its sum of digits (26), we obtain a triangular number (27261 = T₂₃₃).

The spelling of 27287 in words is "twenty-seven thousand, two hundred eighty-seven".