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28263 = 39421
BaseRepresentation
bin110111001100111
31102202210
412321213
51401023
6334503
7145254
oct67147
942683
1028263
111a264
1214433
13cb31
14a42b
158593
hex6e67

28263 has 4 divisors (see below), whose sum is σ = 37688. Its totient is φ = 18840.

The previous prime is 28229. The next prime is 28277. The reversal of 28263 is 36282.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28263 - 29 = 27751 is a prime.

It is a d-powerful number, because it can be written as 22 + 84 + 214 + 65 + 3 .

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28263.

It is not an unprimeable number, because it can be changed into a prime (28283) 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, 4708 + ... + 4713.

It is an arithmetic number, because the mean of its divisors is an integer number (9422).

228263 is an apocalyptic number.

28263 is a deficient number, since it is larger than the sum of its proper divisors (9425).

28263 is an equidigital number, since it uses as much as digits as its factorization.

28263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9424.

The product of its digits is 576, while the sum is 21.

The square root of 28263 is about 168.1160313593. The cubic root of 28263 is about 30.4606677445.

It can be divided in two parts, 282 and 63, that multiplied together give a triangular number (17766 = T188).

The spelling of 28263 in words is "twenty-eight thousand, two hundred sixty-three".

Divisors: 1 3 9421 28263