28617 has 4 divisors (see below), whose sum is σ = 38160. Its totient is φ = 19076.

The previous prime is 28607. The next prime is 28619. The reversal of 28617 is 71682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28617 is a prime.

It is a super-3 number, since 3×28617³ = 70306190283339, which contains 333 as substring.

It is a D-number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (28619) 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, 4767 + ... + 4772.

It is an arithmetic number, because the mean of its divisors is an integer number (9540).

2²⁸⁶¹⁷ is an apocalyptic number.

It is an amenable number.

28617 is a deficient number, since it is larger than the sum of its proper divisors (9543).

28617 is an equidigital number, since it uses as much as digits as its factorization.

28617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542.

The product of its digits is 672, while the sum is 24.

The square root of 28617 is about 169.1655993398. The cubic root of 28617 is about 30.5873158588.

It can be divided in two parts, 286 and 17, that added together give a palindrome (303).

The spelling of 28617 in words is "twenty-eight thousand, six hundred seventeen".