28387 has 2 divisors, whose sum is σ = 28388. Its totient is φ = 28386.

The previous prime is 28351. The next prime is 28393. The reversal of 28387 is 78382.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28387 - 2¹¹ = 26339 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28307) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14193 + 14194.

It is an arithmetic number, because the mean of its divisors is an integer number (14194).

2²⁸³⁸⁷ is an apocalyptic number.

28387 is a deficient number, since it is larger than the sum of its proper divisors (1).

28387 is an equidigital number, since it uses as much as digits as its factorization.

28387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 28387 is about 168.4844206448. The cubic root of 28387 is about 30.5051500754.

The spelling of 28387 in words is "twenty-eight thousand, three hundred eighty-seven".