27930605 has 4 divisors (see below), whose sum is σ = 33516732. Its totient is φ = 22344480.

The previous prime is 27930593. The next prime is 27930611. The reversal of 27930605 is 50603972.

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 13169641 + 14760964 = 3629^2 + 3842^2 .

It is a de Polignac number, because none of the positive numbers 2^k-27930605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2793056 + ... + 2793065.

It is an arithmetic number, because the mean of its divisors is an integer number (8379183).

Almost surely, 2^27930605 is an apocalyptic number.

It is an amenable number.

27930605 is a deficient number, since it is larger than the sum of its proper divisors (5586127).

27930605 is an equidigital number, since it uses as much as digits as its factorization.

27930605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5586126.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 27930605 is about 5284.9413430993. The cubic root of 27930605 is about 303.4078276429.

The spelling of 27930605 in words is "twenty-seven million, nine hundred thirty thousand, six hundred five".