28361191 has 2 divisors, whose sum is σ = 28361192. Its totient is φ = 28361190.

The previous prime is 28361173. The next prime is 28361197. The reversal of 28361191 is 19116382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28361191 - 2¹³ = 28352999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28361197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14180595 + 14180596.

It is an arithmetic number, because the mean of its divisors is an integer number (14180596).

Almost surely, 2^28361191 is an apocalyptic number.

28361191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28361191 is an equidigital number, since it uses as much as digits as its factorization.

28361191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 28361191 is about 5325.5226034634. The cubic root of 28361191 is about 304.9590234299.

The spelling of 28361191 in words is "twenty-eight million, three hundred sixty-one thousand, one hundred ninety-one".