27842 has 4 divisors (see below), whose sum is σ = 41766. Its totient is φ = 13920.

The previous prime is 27827. The next prime is 27847. The reversal of 27842 is 24872.

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

It can be written as a sum of positive squares in only one way, i.e., 22801 + 5041 = 151^2 + 71^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6959 + ... + 6962.

2²⁷⁸⁴² is an apocalyptic number.

27842 is a deficient number, since it is larger than the sum of its proper divisors (13924).

27842 is a wasteful number, since it uses less digits than its factorization.

27842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13923.

The product of its digits is 896, while the sum is 23.

The square root of 27842 is about 166.8592221005. The cubic root of 27842 is about 30.3086651542.

The spelling of 27842 in words is "twenty-seven thousand, eight hundred forty-two".