12331438 has 24 divisors (see below), whose sum is σ = 22264200. Its totient is φ = 5101488.

The previous prime is 12331391. The next prime is 12331441. The reversal of 12331438 is 83413321.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 673 + ... + 5011.

It is an arithmetic number, because the mean of its divisors is an integer number (927675).

Almost surely, 2^12331438 is an apocalyptic number.

12331438 is a deficient number, since it is larger than the sum of its proper divisors (9932762).

12331438 is a wasteful number, since it uses less digits than its factorization.

12331438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384 (or 4377 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 12331438 is about 3511.6147282981. The cubic root of 12331438 is about 231.0315230932.

Adding to 12331438 its reverse (83413321), we get a palindrome (95744759).

It can be divided in two parts, 12331 and 438, that added together give a square (12769 = 113²).

The spelling of 12331438 in words is "twelve million, three hundred thirty-one thousand, four hundred thirty-eight".