12403320 has 64 divisors (see below), whose sum is σ = 38132640. Its totient is φ = 3225600.

The previous prime is 12403309. The next prime is 12403351. The reversal of 12403320 is 2330421.

12403320 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12403320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3660 + ... + 6180.

Almost surely, 2^12403320 is an apocalyptic number.

12403320 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 12403320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19066320).

12403320 is an abundant number, since it is smaller than the sum of its proper divisors (25729320).

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

12403320 is a wasteful number, since it uses less digits than its factorization.

12403320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576 (or 2572 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 12403320 is about 3521.8347491045. The cubic root of 12403320 is about 231.4795606944.

Adding to 12403320 its reverse (2330421), we get a palindrome (14733741).

It can be divided in two parts, 1240 and 3320, that added together give a triangular number (4560 = T₉₅).

The spelling of 12403320 in words is "twelve million, four hundred three thousand, three hundred twenty".