27644145 has 16 divisors (see below), whose sum is σ = 46559040. Its totient is φ = 13967424.

The previous prime is 27644093. The next prime is 27644147. The reversal of 27644145 is 54144672.

It is not a de Polignac number, because 27644145 - 2⁷ = 27644017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27644147) 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 15 ways as a sum of consecutive naturals, for example, 48214 + ... + 48783.

It is an arithmetic number, because the mean of its divisors is an integer number (2909940).

Almost surely, 2^27644145 is an apocalyptic number.

It is an amenable number.

27644145 is a deficient number, since it is larger than the sum of its proper divisors (18914895).

27644145 is a wasteful number, since it uses less digits than its factorization.

27644145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97024.

The product of its digits is 26880, while the sum is 33.

The square root of 27644145 is about 5257.7699645382. The cubic root of 27644145 is about 302.3669975147.

The spelling of 27644145 in words is "twenty-seven million, six hundred forty-four thousand, one hundred forty-five".