12440320 has 36 divisors (see below), whose sum is σ = 29801520. Its totient is φ = 4975616.

The previous prime is 12440317. The next prime is 12440339. The reversal of 12440320 is 2304421.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 12440294 and 12440303.

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 3 ways as a sum of consecutive naturals, for example, 3580 + ... + 6139.

It is an arithmetic number, because the mean of its divisors is an integer number (827820).

Almost surely, 2^12440320 is an apocalyptic number.

12440320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12440320 is an abundant number, since it is smaller than the sum of its proper divisors (17361200).

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

12440320 is an frugal number, since it uses more digits than its factorization.

12440320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9740 (or 9726 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 12440320 is about 3527.0837812561. The cubic root of 12440320 is about 231.7095056181.

Adding to 12440320 its reverse (2304421), we get a palindrome (14744741).

The spelling of 12440320 in words is "twelve million, four hundred forty thousand, three hundred twenty".