27947871 has 24 divisors (see below), whose sum is σ = 46277504. Its totient is φ = 15921360.

The previous prime is 27947867. The next prime is 27947873. The reversal of 27947871 is 17874972.

It is a happy number.

It is not a de Polignac number, because 27947871 - 2² = 27947867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27947873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34056 + ... + 34866.

Almost surely, 2^27947871 is an apocalyptic number.

27947871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27947871 is a deficient number, since it is larger than the sum of its proper divisors (18329633).

27947871 is a wasteful number, since it uses less digits than its factorization.

27947871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371 (or 1368 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 27947871 is about 5286.5745998709. The cubic root of 27947871 is about 303.4703344696.

The spelling of 27947871 in words is "twenty-seven million, nine hundred forty-seven thousand, eight hundred seventy-one".