12439872 has 112 divisors (see below), whose sum is σ = 38282880. Its totient is φ = 3953664.

The previous prime is 12439871. The next prime is 12439877. The reversal of 12439872 is 27893421.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39588 + ... + 39900.

Almost surely, 2^12439872 is an apocalyptic number.

12439872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12439872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19141440).

12439872 is an abundant number, since it is smaller than the sum of its proper divisors (25843008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12439872 is a wasteful number, since it uses less digits than its factorization.

12439872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 341 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 12439872 is about 3527.0202721277. The cubic root of 12439872 is about 231.7067241488.

The spelling of 12439872 in words is "twelve million, four hundred thirty-nine thousand, eight hundred seventy-two".