28475191 has 2 divisors, whose sum is σ = 28475192. Its totient is φ = 28475190.

The previous prime is 28475149. The next prime is 28475203. The reversal of 28475191 is 19157482.

28475191 = 2176² + 2177² + ... + 2181².

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28475191 - 2⁷ = 28475063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28475191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28475591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14237595 + 14237596.

It is an arithmetic number, because the mean of its divisors is an integer number (14237596).

Almost surely, 2^28475191 is an apocalyptic number.

28475191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28475191 is an equidigital number, since it uses as much as digits as its factorization.

28475191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 28475191 is about 5336.2150443924. The cubic root of 28475191 is about 305.3670793043.

The spelling of 28475191 in words is "twenty-eight million, four hundred seventy-five thousand, one hundred ninety-one".