27380065 has 16 divisors (see below), whose sum is σ = 33686928. Its totient is φ = 21355776.

The previous prime is 27380053. The next prime is 27380069. The reversal of 27380065 is 56008372.

It can be written as a sum of positive squares in 8 ways, for example, as 350464 + 27029601 = 592^2 + 5199^2 .

It is a cyclic number.

It is not a de Polignac number, because 27380065 - 2²³ = 18991457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27380069) 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 15 ways as a sum of consecutive naturals, for example, 73219 + ... + 73591.

It is an arithmetic number, because the mean of its divisors is an integer number (2105433).

Almost surely, 2^27380065 is an apocalyptic number.

It is an amenable number.

27380065 is a deficient number, since it is larger than the sum of its proper divisors (6306863).

27380065 is a wasteful number, since it uses less digits than its factorization.

27380065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 27380065 is about 5232.5963918498. The cubic root of 27380065 is about 301.4010944095.

The spelling of 27380065 in words is "twenty-seven million, three hundred eighty thousand, sixty-five".