27844121 has 4 divisors (see below), whose sum is σ = 28300644. Its totient is φ = 27387600.

The previous prime is 27844109. The next prime is 27844123. The reversal of 27844121 is 12144872.

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 1177225 + 26666896 = 1085^2 + 5164^2 .

It is a cyclic number.

It is not a de Polignac number, because 27844121 - 2⁶ = 27844057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27844123) 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, 228170 + ... + 228291.

It is an arithmetic number, because the mean of its divisors is an integer number (7075161).

Almost surely, 2^27844121 is an apocalyptic number.

It is an amenable number.

27844121 is a deficient number, since it is larger than the sum of its proper divisors (456523).

27844121 is an equidigital number, since it uses as much as digits as its factorization.

27844121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456522.

The product of its digits is 3584, while the sum is 29.

The square root of 27844121 is about 5276.7528841135. The cubic root of 27844121 is about 303.0943477136.

Adding to 27844121 its reverse (12144872), we get a palindrome (39988993).

The spelling of 27844121 in words is "twenty-seven million, eight hundred forty-four thousand, one hundred twenty-one".