27944391 has 4 divisors (see below), whose sum is σ = 37259192. Its totient is φ = 18629592.

The previous prime is 27944387. The next prime is 27944401. The reversal of 27944391 is 19344972.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 27944391 - 2² = 27944387 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 (27944341) 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, 4657396 + ... + 4657401.

It is an arithmetic number, because the mean of its divisors is an integer number (9314798).

Almost surely, 2^27944391 is an apocalyptic number.

27944391 is a deficient number, since it is larger than the sum of its proper divisors (9314801).

27944391 is an equidigital number, since it uses as much as digits as its factorization.

27944391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9314800.

The product of its digits is 54432, while the sum is 39.

The square root of 27944391 is about 5286.2454540061. The cubic root of 27944391 is about 303.4577381541.

The spelling of 27944391 in words is "twenty-seven million, nine hundred forty-four thousand, three hundred ninety-one".