12331404 has 72 divisors (see below), whose sum is σ = 33257952. Its totient is φ = 3843840.

The previous prime is 12331391. The next prime is 12331441. The reversal of 12331404 is 40413321.

It is a super-2 number, since 2×12331404² = 304127049222432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 43744 + ... + 44024.

It is an arithmetic number, because the mean of its divisors is an integer number (461916).

Almost surely, 2^12331404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12331404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16628976).

12331404 is an abundant number, since it is smaller than the sum of its proper divisors (20926548).

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

12331404 is a wasteful number, since it uses less digits than its factorization.

12331404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 12331404 is about 3511.6098872170. The cubic root of 12331404 is about 231.0313107612.

Adding to 12331404 its reverse (40413321), we get a palindrome (52744725).

The spelling of 12331404 in words is "twelve million, three hundred thirty-one thousand, four hundred four".