28340171 has 2 divisors, whose sum is σ = 28340172. Its totient is φ = 28340170.

The previous prime is 28340149. The next prime is 28340189. The reversal of 28340171 is 17104382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28340171 - 2¹⁰ = 28339147 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28340171.

It is not a weakly prime, because it can be changed into another prime (28340111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14170085 + 14170086.

It is an arithmetic number, because the mean of its divisors is an integer number (14170086).

Almost surely, 2^28340171 is an apocalyptic number.

28340171 is a deficient number, since it is larger than the sum of its proper divisors (1).

28340171 is an equidigital number, since it uses as much as digits as its factorization.

28340171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 28340171 is about 5323.5487224219. The cubic root of 28340171 is about 304.8836643124.

The spelling of 28340171 in words is "twenty-eight million, three hundred forty thousand, one hundred seventy-one".