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28204 = 2211641
BaseRepresentation
bin110111000101100
31102200121
412320230
51400304
6334324
7145141
oct67054
942617
1028204
111a210
12143a4
13cab7
14a3c8
158554
hex6e2c

28204 has 12 divisors (see below), whose sum is σ = 53928. Its totient is φ = 12800.

The previous prime is 28201. The next prime is 28211. The reversal of 28204 is 40282.

It is a pancake number, because a pancake can be divided into 28204 parts by 237 straight cuts.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (28201) 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, 277 + ... + 364.

It is an arithmetic number, because the mean of its divisors is an integer number (4494).

228204 is an apocalyptic number.

It is an amenable number.

28204 is a deficient number, since it is larger than the sum of its proper divisors (25724).

28204 is a wasteful number, since it uses less digits than its factorization.

28204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 28204 is about 167.9404656418. The cubic root of 28204 is about 30.4394570756.

Adding to 28204 its reverse (40282), we get a palindrome (68486).

It can be divided in two parts, 28 and 204, that added together give a palindrome (232).

The spelling of 28204 in words is "twenty-eight thousand, two hundred four".

Divisors: 1 2 4 11 22 44 641 1282 2564 7051 14102 28204