12439982 has 4 divisors (see below), whose sum is σ = 18659976. Its totient is φ = 6219990.

The previous prime is 12439979. The next prime is 12440009. The reversal of 12439982 is 28993421.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3109994 + ... + 3109997.

It is an arithmetic number, because the mean of its divisors is an integer number (4664994).

Almost surely, 2^12439982 is an apocalyptic number.

12439982 is a deficient number, since it is larger than the sum of its proper divisors (6219994).

12439982 is an equidigital number, since it uses as much as digits as its factorization.

12439982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6219993.

The product of its digits is 31104, while the sum is 38.

The square root of 12439982 is about 3527.0358659929. The cubic root of 12439982 is about 231.7074071051.

The spelling of 12439982 in words is "twelve million, four hundred thirty-nine thousand, nine hundred eighty-two".