12812438 has 4 divisors (see below), whose sum is σ = 19218660. Its totient is φ = 6406218.

The previous prime is 12812419. The next prime is 12812473. The reversal of 12812438 is 83421821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83421821 = 7 ⋅11917403.

It is a self number, because there is not a number n which added to its sum of digits gives 12812438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203108 + ... + 3203111.

It is an arithmetic number, because the mean of its divisors is an integer number (4804665).

Almost surely, 2^12812438 is an apocalyptic number.

12812438 is a deficient number, since it is larger than the sum of its proper divisors (6406222).

12812438 is an equidigital number, since it uses as much as digits as its factorization.

12812438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6406221.

The product of its digits is 3072, while the sum is 29.

The square root of 12812438 is about 3579.4466052729. The cubic root of 12812438 is about 233.9971631380.

The spelling of 12812438 in words is "twelve million, eight hundred twelve thousand, four hundred thirty-eight".