28459 has 4 divisors (see below), whose sum is σ = 28800. Its totient is φ = 28120.

The previous prime is 28447. The next prime is 28463. The reversal of 28459 is 95482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 95482 = 2 ⋅47741.

It is a cyclic number.

It is not a de Polignac number, because 28459 - 2⁹ = 27947 is a prime.

It is a Duffinian number.

28459 is a lucky number.

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (28409) 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, 54 + ... + 244.

It is an arithmetic number, because the mean of its divisors is an integer number (7200).

2²⁸⁴⁵⁹ is an apocalyptic number.

28459 is a deficient number, since it is larger than the sum of its proper divisors (341).

28459 is a wasteful number, since it uses less digits than its factorization.

28459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340.

The product of its digits is 2880, while the sum is 28.

The square root of 28459 is about 168.6979549372. The cubic root of 28459 is about 30.5309191068.

It can be divided in two parts, 284 and 59, that added together give a palindrome (343).

The spelling of 28459 in words is "twenty-eight thousand, four hundred fifty-nine".