28849 has 4 divisors (see below), whose sum is σ = 30564. Its totient is φ = 27136.

The previous prime is 28843. The next prime is 28859. The reversal of 28849 is 94882.

28849 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94882 = 2 ⋅47441.

It can be written as a sum of positive squares in 2 ways, for example, as 25600 + 3249 = 160^2 + 57^2 .

It is a cyclic number.

It is not a de Polignac number, because 28849 - 2⁵ = 28817 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28849.

It is not an unprimeable number, because it can be changed into a prime (28843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832 + ... + 865.

It is an arithmetic number, because the mean of its divisors is an integer number (7641).

2²⁸⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

28849 is a deficient number, since it is larger than the sum of its proper divisors (1715).

28849 is a wasteful number, since it uses less digits than its factorization.

28849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714.

The product of its digits is 4608, while the sum is 31.

The square root of 28849 is about 169.8499337651. The cubic root of 28849 is about 30.6697513175.

The spelling of 28849 in words is "twenty-eight thousand, eight hundred forty-nine".