12404400320 has 56 divisors (see below), whose sum is σ = 31810141104. Its totient is φ = 4580084736.

The previous prime is 12404400299. The next prime is 12404400329. The reversal of 12404400320 is 2300440421.

It is a super-2 number, since 2×12404400320² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12404400292 and 12404400301.

It is not an unprimeable number, because it can be changed into a prime (12404400329) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1486754 + ... + 1495073.

It is an arithmetic number, because the mean of its divisors is an integer number (568038234).

Almost surely, 2^12404400320 is an apocalyptic number.

12404400320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12404400320 is an abundant number, since it is smaller than the sum of its proper divisors (19405740784).

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

12404400320 is a wasteful number, since it uses less digits than its factorization.

12404400320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981857 (or 2981847 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 12404400320 its reverse (2300440421), we get a palindrome (14704840741).

The spelling of 12404400320 in words is "twelve billion, four hundred four million, four hundred thousand, three hundred twenty".