28893 has 4 divisors (see below), whose sum is σ = 38528. Its totient is φ = 19260.

The previous prime is 28879. The next prime is 28901. The reversal of 28893 is 39882.

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 de Polignac number, because none of the positive numbers 2^k-28893 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 28893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28813) 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, 4813 + ... + 4818.

It is an arithmetic number, because the mean of its divisors is an integer number (9632).

2²⁸⁸⁹³ is an apocalyptic number.

It is an amenable number.

28893 is a deficient number, since it is larger than the sum of its proper divisors (9635).

28893 is an equidigital number, since it uses as much as digits as its factorization.

28893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9634.

The product of its digits is 3456, while the sum is 30.

The square root of 28893 is about 169.9794105179. The cubic root of 28893 is about 30.6853357234.

The spelling of 28893 in words is "twenty-eight thousand, eight hundred ninety-three".