28127 has 4 divisors (see below), whose sum is σ = 30696. Its totient is φ = 25560.

The previous prime is 28123. The next prime is 28151. The reversal of 28127 is 72182.

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 28127 - 2² = 28123 is a prime.

It is a super-2 number, since 2×28127² = 1582256258, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 28099 and 28108.

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 28127.

It is not an unprimeable number, because it can be changed into a prime (28123) 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, 1268 + ... + 1289.

It is an arithmetic number, because the mean of its divisors is an integer number (7674).

2²⁸¹²⁷ is an apocalyptic number.

28127 is a deficient number, since it is larger than the sum of its proper divisors (2569).

28127 is a wasteful number, since it uses less digits than its factorization.

28127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568.

The product of its digits is 224, while the sum is 20.

The square root of 28127 is about 167.7110610544. The cubic root of 28127 is about 30.4117308144.

The spelling of 28127 in words is "twenty-eight thousand, one hundred twenty-seven".