28871 has 2 divisors, whose sum is σ = 28872. Its totient is φ = 28870.

The previous prime is 28867. The next prime is 28879. The reversal of 28871 is 17882.

28871 is nontrivially palindromic in base 8.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28871 - 2² = 28867 is a prime.

It is a Chen prime.

It is a nialpdrome in base 14.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 28871.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28871.

It is not a weakly prime, because it can be changed into another prime (28879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14435 + 14436.

It is an arithmetic number, because the mean of its divisors is an integer number (14436).

2²⁸⁸⁷¹ is an apocalyptic number.

28871 is a deficient number, since it is larger than the sum of its proper divisors (1).

28871 is an equidigital number, since it uses as much as digits as its factorization.

28871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 26.

The square root of 28871 is about 169.9146844743. The cubic root of 28871 is about 30.6775454997.

The spelling of 28871 in words is "twenty-eight thousand, eight hundred seventy-one".