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28271 = 171663
BaseRepresentation
bin110111001101111
31102210002
412321233
51401041
6334515
7145265
oct67157
942702
1028271
111a271
121443b
13cb39
14a435
15859b
hex6e6f

28271 has 4 divisors (see below), whose sum is σ = 29952. Its totient is φ = 26592.

The previous prime is 28229. The next prime is 28277. The reversal of 28271 is 17282.

28271 is nontrivially palindromic in base 5.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17282 = 28641.

It is a cyclic number.

It is not a de Polignac number, because 28271 - 214 = 11887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815 + ... + 848.

It is an arithmetic number, because the mean of its divisors is an integer number (7488).

228271 is an apocalyptic number.

28271 is a deficient number, since it is larger than the sum of its proper divisors (1681).

28271 is a wasteful number, since it uses less digits than its factorization.

28271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680.

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

The square root of 28271 is about 168.1398227666. The cubic root of 28271 is about 30.4635414941.

It can be divided in two parts, 282 and 71, that added together give a palindrome (353).

The spelling of 28271 in words is "twenty-eight thousand, two hundred seventy-one".

Divisors: 1 17 1663 28271