28189113 has 4 divisors (see below), whose sum is σ = 37585488. Its totient is φ = 18792740.

The previous prime is 28189069. The next prime is 28189151. The reversal of 28189113 is 31198182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28189113 - 2¹⁰ = 28188089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28189813) 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 in 3 ways as a sum of consecutive naturals, for example, 4698183 + ... + 4698188.

It is an arithmetic number, because the mean of its divisors is an integer number (9396372).

Almost surely, 2^28189113 is an apocalyptic number.

It is an amenable number.

28189113 is a deficient number, since it is larger than the sum of its proper divisors (9396375).

28189113 is an equidigital number, since it uses as much as digits as its factorization.

28189113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9396374.

The product of its digits is 3456, while the sum is 33.

The square root of 28189113 is about 5309.3420496329. The cubic root of 28189113 is about 304.3410048371.

The spelling of 28189113 in words is "twenty-eight million, one hundred eighty-nine thousand, one hundred thirteen".