28236 has 24 divisors (see below), whose sum is σ = 71344. Its totient is φ = 8640.

The previous prime is 28229. The next prime is 28277. The reversal of 28236 is 63282.

28236 = T₃₃ + T₃₄ + ... + T₅₈.

28236 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66 + ... + 246.

2²⁸²³⁶ is an apocalyptic number.

28236 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35672).

28236 is an abundant number, since it is smaller than the sum of its proper divisors (43108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28236 is a wasteful number, since it uses less digits than its factorization.

28236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 199 counting only the distinct ones).

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

The square root of 28236 is about 168.0357104904. The cubic root of 28236 is about 30.4509648342.

The spelling of 28236 in words is "twenty-eight thousand, two hundred thirty-six".