28558 has 8 divisors (see below), whose sum is σ = 43560. Its totient is φ = 14040.

The previous prime is 28549. The next prime is 28559. The reversal of 28558 is 85582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28559) 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, 153 + ... + 283.

It is an arithmetic number, because the mean of its divisors is an integer number (5445).

2²⁸⁵⁵⁸ is an apocalyptic number.

28558 is a deficient number, since it is larger than the sum of its proper divisors (15002).

28558 is a wasteful number, since it uses less digits than its factorization.

28558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242.

The product of its digits is 3200, while the sum is 28.

The square root of 28558 is about 168.9911240273. The cubic root of 28558 is about 30.5662806550.

It can be divided in two parts, 285 and 58, that added together give a palindrome (343).

The spelling of 28558 in words is "twenty-eight thousand, five hundred fifty-eight".