28863 has 8 divisors (see below), whose sum is σ = 42800. Its totient is φ = 19224.

The previous prime is 28859. The next prime is 28867. The reversal of 28863 is 36882.

It is an interprime number because it is at equal distance from previous prime (28859) and next prime (28867).

It is not a de Polignac number, because 28863 - 2² = 28859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1069 = 28863 / (2 + 8 + 8 + 6 + 3).

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508 + ... + 561.

It is an arithmetic number, because the mean of its divisors is an integer number (5350).

2²⁸⁸⁶³ is an apocalyptic number.

28863 is a deficient number, since it is larger than the sum of its proper divisors (13937).

28863 is a wasteful number, since it uses less digits than its factorization.

28863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1072 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 28863 is about 169.8911416172. The cubic root of 28863 is about 30.6747117099.

It can be divided in two parts, 288 and 63, that added together give a triangular number (351 = T₂₆).

The spelling of 28863 in words is "twenty-eight thousand, eight hundred sixty-three".