12404320 has 24 divisors (see below), whose sum is σ = 29305584. Its totient is φ = 4961664.

The previous prime is 12404311. The next prime is 12404333. The reversal of 12404320 is 2340421.

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 = 12404294 and 12404303.

It is a congruent number.

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, 38604 + ... + 38923.

It is an arithmetic number, because the mean of its divisors is an integer number (1221066).

Almost surely, 2^12404320 is an apocalyptic number.

12404320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12404320 is an abundant number, since it is smaller than the sum of its proper divisors (16901264).

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

12404320 is an equidigital number, since it uses as much as digits as its factorization.

12404320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77542 (or 77534 counting only the distinct ones).

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

The square root of 12404320 is about 3521.9767176970. The cubic root of 12404320 is about 231.4857814304.

Adding to 12404320 its reverse (2340421), we get a palindrome (14744741).

The spelling of 12404320 in words is "twelve million, four hundred four thousand, three hundred twenty".