27439971 has 24 divisors (see below), whose sum is σ = 41605200. Its totient is φ = 15989184.

The previous prime is 27439961. The next prime is 27439999. The reversal of 27439971 is 17993472.

It is not a de Polignac number, because 27439971 - 2⁷ = 27439843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27439961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13105 + ... + 15053.

It is an arithmetic number, because the mean of its divisors is an integer number (1733550).

Almost surely, 2^27439971 is an apocalyptic number.

27439971 is a deficient number, since it is larger than the sum of its proper divisors (14165229).

27439971 is a wasteful number, since it uses less digits than its factorization.

27439971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003 (or 1984 counting only the distinct ones).

The product of its digits is 95256, while the sum is 42.

The square root of 27439971 is about 5238.3175734199. The cubic root of 27439971 is about 301.6207503483.

The spelling of 27439971 in words is "twenty-seven million, four hundred thirty-nine thousand, nine hundred seventy-one".