28817 has 2 divisors, whose sum is σ = 28818. Its totient is φ = 28816.

The previous prime is 28813. The next prime is 28837. The reversal of 28817 is 71882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28561 + 256 = 169^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 28817 - 2² = 28813 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28817.

It is not a weakly prime, because it can be changed into another prime (28813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14408 + 14409.

It is an arithmetic number, because the mean of its divisors is an integer number (14409).

2²⁸⁸¹⁷ is an apocalyptic number.

It is an amenable number.

28817 is a deficient number, since it is larger than the sum of its proper divisors (1).

28817 is an equidigital number, since it uses as much as digits as its factorization.

28817 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 28817 is about 169.7557068260. The cubic root of 28817 is about 30.6584072485.

The spelling of 28817 in words is "twenty-eight thousand, eight hundred seventeen".