27889105 has 4 divisors (see below), whose sum is σ = 33466932. Its totient is φ = 22311280.

The previous prime is 27889063. The next prime is 27889111. The reversal of 27889105 is 50198872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9979281 + 17909824 = 3159^2 + 4232^2 .

It is not a de Polignac number, because 27889105 - 2²³ = 19500497 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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, 2788906 + ... + 2788915.

It is an arithmetic number, because the mean of its divisors is an integer number (8366733).

Almost surely, 2^27889105 is an apocalyptic number.

It is an amenable number.

27889105 is a deficient number, since it is larger than the sum of its proper divisors (5577827).

27889105 is an equidigital number, since it uses as much as digits as its factorization.

27889105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5577826.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 27889105 is about 5281.0136337639. The cubic root of 27889105 is about 303.2574828125.

The spelling of 27889105 in words is "twenty-seven million, eight hundred eighty-nine thousand, one hundred five".