12809438 has 4 divisors (see below), whose sum is σ = 19214160. Its totient is φ = 6404718.

The previous prime is 12809359. The next prime is 12809491. The reversal of 12809438 is 83490821.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12809398 and 12809407.

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, 3202358 + ... + 3202361.

It is an arithmetic number, because the mean of its divisors is an integer number (4803540).

Almost surely, 2^12809438 is an apocalyptic number.

12809438 is a deficient number, since it is larger than the sum of its proper divisors (6404722).

12809438 is an equidigital number, since it uses as much as digits as its factorization.

12809438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404721.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 12809438 is about 3579.0275215483. The cubic root of 12809438 is about 233.9788984308.

The spelling of 12809438 in words is "twelve million, eight hundred nine thousand, four hundred thirty-eight".