12438406 has 4 divisors (see below), whose sum is σ = 18657612. Its totient is φ = 6219202.

The previous prime is 12438403. The next prime is 12438421. The reversal of 12438406 is 60483421.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3109600 + ... + 3109603.

It is an arithmetic number, because the mean of its divisors is an integer number (4664403).

Almost surely, 2^12438406 is an apocalyptic number.

12438406 is a deficient number, since it is larger than the sum of its proper divisors (6219206).

12438406 is an equidigital number, since it uses as much as digits as its factorization.

12438406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6219205.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 12438406 is about 3526.8124418517. The cubic root of 12438406 is about 231.6976218204.

The spelling of 12438406 in words is "twelve million, four hundred thirty-eight thousand, four hundred six".