27540389 has 4 divisors (see below), whose sum is σ = 27699756. Its totient is φ = 27381024.

The previous prime is 27540379. The next prime is 27540413. The reversal of 27540389 is 98304572.

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 23600164 + 3940225 = 4858^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 27540389 - 2⁸ = 27540133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27540319) 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, 79424 + ... + 79769.

It is an arithmetic number, because the mean of its divisors is an integer number (6924939).

Almost surely, 2^27540389 is an apocalyptic number.

It is an amenable number.

27540389 is a deficient number, since it is larger than the sum of its proper divisors (159367).

27540389 is a wasteful number, since it uses less digits than its factorization.

27540389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159366.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 27540389 is about 5247.8937679797. The cubic root of 27540389 is about 301.9882347068.

The spelling of 27540389 in words is "twenty-seven million, five hundred forty thousand, three hundred eighty-nine".