27742227 has 4 divisors (see below), whose sum is σ = 36989640. Its totient is φ = 18494816.

The previous prime is 27742219. The next prime is 27742229. The reversal of 27742227 is 72224772.

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

It is a cyclic number.

It is not a de Polignac number, because 27742227 - 2³ = 27742219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27742229) 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 3 ways as a sum of consecutive naturals, for example, 4623702 + ... + 4623707.

It is an arithmetic number, because the mean of its divisors is an integer number (9247410).

Almost surely, 2^27742227 is an apocalyptic number.

27742227 is a deficient number, since it is larger than the sum of its proper divisors (9247413).

27742227 is an equidigital number, since it uses as much as digits as its factorization.

27742227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9247412.

The product of its digits is 21952, while the sum is 33.

The square root of 27742227 is about 5267.0890442445. The cubic root of 27742227 is about 302.7241768807.

Adding to 27742227 its reverse (72224772), we get a palindrome (99966999).

The spelling of 27742227 in words is "twenty-seven million, seven hundred forty-two thousand, two hundred twenty-seven".