27938765 has 4 divisors (see below), whose sum is σ = 33526524. Its totient is φ = 22351008.

The previous prime is 27938761. The next prime is 27938783. The reversal of 27938765 is 56783972.

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 3396649 + 24542116 = 1843^2 + 4954^2 .

It is a cyclic number.

It is not a de Polignac number, because 27938765 - 2² = 27938761 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 (27938761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2793872 + ... + 2793881.

It is an arithmetic number, because the mean of its divisors is an integer number (8381631).

Almost surely, 2^27938765 is an apocalyptic number.

It is an amenable number.

27938765 is a deficient number, since it is larger than the sum of its proper divisors (5587759).

27938765 is an equidigital number, since it uses as much as digits as its factorization.

27938765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5587758.

The product of its digits is 635040, while the sum is 47.

The square root of 27938765 is about 5285.7132915057. The cubic root of 27938765 is about 303.4373718986.

The spelling of 27938765 in words is "twenty-seven million, nine hundred thirty-eight thousand, seven hundred sixty-five".