12399320 has 32 divisors (see below), whose sum is σ = 28036800. Its totient is φ = 4935168.

The previous prime is 12399313. The next prime is 12399347. The reversal of 12399320 is 2399321.

It is a congruent number.

It is an unprimeable number.

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, 8912 + ... + 10208.

It is an arithmetic number, because the mean of its divisors is an integer number (876150).

Almost surely, 2^12399320 is an apocalyptic number.

12399320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12399320 is an abundant number, since it is smaller than the sum of its proper divisors (15637480).

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

12399320 is a wasteful number, since it uses less digits than its factorization.

12399320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547 (or 1543 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 12399320 is about 3521.2668174962. The cubic root of 12399320 is about 231.4546744060.

Subtracting from 12399320 its reverse (2399321), we obtain a palindrome (9999999).

The spelling of 12399320 in words is "twelve million, three hundred ninety-nine thousand, three hundred twenty".