12326440 has 96 divisors (see below), whose sum is σ = 34063200. Its totient is φ = 3991680.

The previous prime is 12326417. The next prime is 12326441. The reversal of 12326440 is 4462321.

It is a happy number.

It is a super-2 number, since 2×12326440² = 303882246147200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12326441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37075 + ... + 37405.

It is an arithmetic number, because the mean of its divisors is an integer number (354825).

Almost surely, 2^12326440 is an apocalyptic number.

12326440 is a gapful number since it is divisible by the number (10) 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 12326440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17031600).

12326440 is an abundant number, since it is smaller than the sum of its proper divisors (21736760).

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

12326440 is a wasteful number, since it uses less digits than its factorization.

12326440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 12326440 is about 3510.9030177434. The cubic root of 12326440 is about 231.0003060908. Note that the first 3 decimals are identical.

Adding to 12326440 its reverse (4462321), we get a palindrome (16788761).

The spelling of 12326440 in words is "twelve million, three hundred twenty-six thousand, four hundred forty".