27742427 has 4 divisors (see below), whose sum is σ = 28637376. Its totient is φ = 26847480.

The previous prime is 27742417. The next prime is 27742433. The reversal of 27742427 is 72424772.

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 27742427 - 2¹⁸ = 27480283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27742417) 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, 447428 + ... + 447489.

It is an arithmetic number, because the mean of its divisors is an integer number (7159344).

Almost surely, 2^27742427 is an apocalyptic number.

27742427 is a deficient number, since it is larger than the sum of its proper divisors (894949).

27742427 is an equidigital number, since it uses as much as digits as its factorization.

27742427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894948.

The product of its digits is 43904, while the sum is 35.

The square root of 27742427 is about 5267.1080300294. The cubic root of 27742427 is about 302.7249043480.

The spelling of 27742427 in words is "twenty-seven million, seven hundred forty-two thousand, four hundred twenty-seven".