27028 has 12 divisors (see below), whose sum is σ = 49140. Its totient is φ = 12992.

The previous prime is 27017. The next prime is 27031. The reversal of 27028 is 82072.

27028 is a nontrivial binomial coefficient, being equal to C(233, 2).

It can be written as a sum of positive squares in 2 ways, for example, as 9604 + 17424 = 98^2 + 132^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26996 and 27014.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 232.

It is an arithmetic number, because the mean of its divisors is an integer number (4095).

2²⁷⁰²⁸ is an apocalyptic number.

27028 is the 232-nd triangular number.

27028 is the 78-th centered nonagonal number.

It is an amenable number.

27028 is a deficient number, since it is larger than the sum of its proper divisors (22112).

27028 is a wasteful number, since it uses less digits than its factorization.

27028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 27028 is about 164.4019464605. The cubic root of 27028 is about 30.0103667876.

The spelling of 27028 in words is "twenty-seven thousand, twenty-eight".