28388 has 12 divisors (see below), whose sum is σ = 51072. Its totient is φ = 13800.

The previous prime is 28387. The next prime is 28393. The reversal of 28388 is 88382.

28388 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a self number, because there is not a number n which added to its sum of digits gives 28388.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28388.

It is not an unprimeable number, because it can be changed into a prime (28387) 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, 113 + ... + 263.

It is an arithmetic number, because the mean of its divisors is an integer number (4256).

2²⁸³⁸⁸ is an apocalyptic number.

It is an amenable number.

28388 is a deficient number, since it is larger than the sum of its proper divisors (22684).

28388 is a wasteful number, since it uses less digits than its factorization.

28388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 200 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 28388 is about 168.4873882521. The cubic root of 28388 is about 30.5055082769.

The spelling of 28388 in words is "twenty-eight thousand, three hundred eighty-eight".