12403408 has 20 divisors (see below), whose sum is σ = 24175908. Its totient is φ = 6164480.

The previous prime is 12403397. The next prime is 12403423. The reversal of 12403408 is 80430421.

It can be written as a sum of positive squares in 2 ways, for example, as 10575504 + 1827904 = 3252^2 + 1352^2 .

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, 528 + ... + 5008.

Almost surely, 2^12403408 is an apocalyptic number.

It is an amenable number.

12403408 is a deficient number, since it is larger than the sum of its proper divisors (11772500).

12403408 is a wasteful number, since it uses less digits than its factorization.

12403408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662 (or 4656 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 12403408 is about 3521.8472425703. The cubic root of 12403408 is about 231.4801081326.

Adding to 12403408 its reverse (80430421), we get a palindrome (92833829).

The spelling of 12403408 in words is "twelve million, four hundred three thousand, four hundred eight".