27427005 has 40 divisors (see below), whose sum is σ = 49545144. Its totient is φ = 14515200.

The previous prime is 27426979. The next prime is 27427007. The reversal of 27427005 is 50072472.

It can be written as a sum of positive squares in 4 ways, for example, as 7338681 + 20088324 = 2709^2 + 4482^2 .

It is not a de Polignac number, because 27427005 - 2⁶ = 27426941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 27427005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27427007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 97465 + ... + 97745.

Almost surely, 2^27427005 is an apocalyptic number.

It is an amenable number.

27427005 is a deficient number, since it is larger than the sum of its proper divisors (22118139).

27427005 is a wasteful number, since it uses less digits than its factorization.

27427005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 27427005 is about 5237.0798160807. The cubic root of 27427005 is about 301.5732353468.

Adding to 27427005 its reverse (50072472), we get a palindrome (77499477).

The spelling of 27427005 in words is "twenty-seven million, four hundred twenty-seven thousand, five".