27838971 has 20 divisors (see below), whose sum is σ = 43777800. Its totient is φ = 17581536.

The previous prime is 27838957. The next prime is 27838981. The reversal of 27838971 is 17983872.

It is not a de Polignac number, because 27838971 - 2¹⁷ = 27707899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27838981) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7506 + ... + 10583.

It is an arithmetic number, because the mean of its divisors is an integer number (2188890).

Almost surely, 2^27838971 is an apocalyptic number.

27838971 is a deficient number, since it is larger than the sum of its proper divisors (15938829).

27838971 is a wasteful number, since it uses less digits than its factorization.

27838971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18120 (or 18111 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 27838971 is about 5276.2648720473. The cubic root of 27838971 is about 303.0756599609.

The spelling of 27838971 in words is "twenty-seven million, eight hundred thirty-eight thousand, nine hundred seventy-one".