28365191 has 2 divisors, whose sum is σ = 28365192. Its totient is φ = 28365190.

The previous prime is 28365173. The next prime is 28365203. The reversal of 28365191 is 19156382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28365191 - 2¹⁴ = 28348807 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28365121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14182595 + 14182596.

It is an arithmetic number, because the mean of its divisors is an integer number (14182596).

Almost surely, 2^28365191 is an apocalyptic number.

28365191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28365191 is an equidigital number, since it uses as much as digits as its factorization.

28365191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 28365191 is about 5325.8981402201. The cubic root of 28365191 is about 304.9733596726.

The spelling of 28365191 in words is "twenty-eight million, three hundred sixty-five thousand, one hundred ninety-one".