27636641 has 4 divisors (see below), whose sum is σ = 27658884. Its totient is φ = 27614400.

The previous prime is 27636619. The next prime is 27636643. The reversal of 27636641 is 14663672.

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 23078416 + 4558225 = 4804^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 27636641 - 2¹⁰ = 27635617 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (27636643) 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, 9140 + ... + 11781.

It is an arithmetic number, because the mean of its divisors is an integer number (6914721).

Almost surely, 2^27636641 is an apocalyptic number.

It is an amenable number.

27636641 is a deficient number, since it is larger than the sum of its proper divisors (22243).

27636641 is a wasteful number, since it uses less digits than its factorization.

27636641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22242.

The product of its digits is 36288, while the sum is 35.

The square root of 27636641 is about 5257.0563055763. The cubic root of 27636641 is about 302.3396358765.

The spelling of 27636641 in words is "twenty-seven million, six hundred thirty-six thousand, six hundred forty-one".