12443320 has 64 divisors (see below), whose sum is σ = 30715200. Its totient is φ = 4515840.

The previous prime is 12443317. The next prime is 12443323. The reversal of 12443320 is 2334421.

It is an interprime number because it is at equal distance from previous prime (12443317) and next prime (12443323).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19405 + ... + 20035.

It is an arithmetic number, because the mean of its divisors is an integer number (479925).

Almost surely, 2^12443320 is an apocalyptic number.

12443320 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 12443320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15357600).

12443320 is an abundant number, since it is smaller than the sum of its proper divisors (18271880).

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

12443320 is a wasteful number, since it uses less digits than its factorization.

12443320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 12443320 is about 3527.5090361330. The cubic root of 12443320 is about 231.7281298081.

Adding to 12443320 its reverse (2334421), we get a palindrome (14777741).

The spelling of 12443320 in words is "twelve million, four hundred forty-three thousand, three hundred twenty".