12409438 has 4 divisors (see below), whose sum is σ = 18614160. Its totient is φ = 6204718.

The previous prime is 12409433. The next prime is 12409459. The reversal of 12409438 is 83490421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83490421 = 7 ⋅11927203.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12409433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3102358 + ... + 3102361.

It is an arithmetic number, because the mean of its divisors is an integer number (4653540).

Almost surely, 2^12409438 is an apocalyptic number.

12409438 is a deficient number, since it is larger than the sum of its proper divisors (6204722).

12409438 is an equidigital number, since it uses as much as digits as its factorization.

12409438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6204721.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 12409438 is about 3522.7032233783. The cubic root of 12409438 is about 231.5176139244.

Adding to 12409438 its reverse (83490421), we get a palindrome (95899859).

The spelling of 12409438 in words is "twelve million, four hundred nine thousand, four hundred thirty-eight".