28574191 has 2 divisors, whose sum is σ = 28574192. Its totient is φ = 28574190.

The previous prime is 28574179. The next prime is 28574209. The reversal of 28574191 is 19147582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28574191 - 2⁵ = 28574159 is a prime.

It is equal to p_1774927 and since 28574191 and 1774927 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28574191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28574131) 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, 14287095 + 14287096.

It is an arithmetic number, because the mean of its divisors is an integer number (14287096).

Almost surely, 2^28574191 is an apocalyptic number.

28574191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28574191 is an equidigital number, since it uses as much as digits as its factorization.

28574191 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 28574191 is about 5345.4832335346. The cubic root of 28574191 is about 305.7205609620.

The spelling of 28574191 in words is "twenty-eight million, five hundred seventy-four thousand, one hundred ninety-one".