28132 has 12 divisors (see below), whose sum is σ = 53116. Its totient is φ = 12960.

The previous prime is 28123. The next prime is 28151. The reversal of 28132 is 23182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7396 + 20736 = 86^2 + 144^2 .

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2⁸ + 8⁴ + 1 + 3⁹ + 2¹² .

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219 + ... + 322.

2²⁸¹³² is an apocalyptic number.

It is an amenable number.

28132 is a deficient number, since it is larger than the sum of its proper divisors (24984).

28132 is a wasteful number, since it uses less digits than its factorization.

28132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 556 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 28132 is about 167.7259669819. The cubic root of 28132 is about 30.4135327561.

Subtracting from 28132 its reverse (23182), we obtain a triangular number (4950 = T₉₉).

It can be divided in two parts, 281 and 32, that added together give a palindrome (313).

The spelling of 28132 in words is "twenty-eight thousand, one hundred thirty-two".