27996271 has 4 divisors (see below), whose sum is σ = 28059912. Its totient is φ = 27932632.

The previous prime is 27996259. The next prime is 27996299. The reversal of 27996271 is 17269972.

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 27996271 - 2¹⁵ = 27963503 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 (27996211) 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, 31156 + ... + 32041.

It is an arithmetic number, because the mean of its divisors is an integer number (7014978).

Almost surely, 2^27996271 is an apocalyptic number.

27996271 is a deficient number, since it is larger than the sum of its proper divisors (63641).

27996271 is an equidigital number, since it uses as much as digits as its factorization.

27996271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63640.

The product of its digits is 95256, while the sum is 43.

The square root of 27996271 is about 5291.1502530168. The cubic root of 27996271 is about 303.6454163031.

The spelling of 27996271 in words is "twenty-seven million, nine hundred ninety-six thousand, two hundred seventy-one".