28277 has 2 divisors, whose sum is σ = 28278. Its totient is φ = 28276.

The previous prime is 28229. The next prime is 28279. The reversal of 28277 is 77282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22801 + 5476 = 151^2 + 74^2 .

It is a cyclic number.

It is not a de Polignac number, because 28277 - 2¹⁰ = 27253 is a prime.

Together with 28279, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

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 28277.

It is not a weakly prime, because it can be changed into another prime (28279) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14138 + 14139.

It is an arithmetic number, because the mean of its divisors is an integer number (14139).

2²⁸²⁷⁷ is an apocalyptic number.

It is an amenable number.

28277 is a deficient number, since it is larger than the sum of its proper divisors (1).

28277 is an equidigital number, since it uses as much as digits as its factorization.

28277 is an evil number, because the sum of its binary digits is even.

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

The square root of 28277 is about 168.1576641132. The cubic root of 28277 is about 30.4656964505.

The spelling of 28277 in words is "twenty-eight thousand, two hundred seventy-seven".