27189145 has 8 divisors (see below), whose sum is σ = 32663304. Its totient is φ = 21727104.

The previous prime is 27189143. The next prime is 27189161. The reversal of 27189145 is 54198172.

It can be written as a sum of positive squares in 4 ways, for example, as 4177936 + 23011209 = 2044^2 + 4797^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27189145 - 2¹ = 27189143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27189143) 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 in 7 ways as a sum of consecutive naturals, for example, 3007 + ... + 7963.

It is an arithmetic number, because the mean of its divisors is an integer number (4082913).

Almost surely, 2^27189145 is an apocalyptic number.

It is an amenable number.

27189145 is a deficient number, since it is larger than the sum of its proper divisors (5474159).

27189145 is a wasteful number, since it uses less digits than its factorization.

27189145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6059.

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

The square root of 27189145 is about 5214.3211446937. The cubic root of 27189145 is about 300.6989075335.

The spelling of 27189145 in words is "twenty-seven million, one hundred eighty-nine thousand, one hundred forty-five".