12689438 has 8 divisors (see below), whose sum is σ = 19222920. Its totient is φ = 6281800.

The previous prime is 12689423. The next prime is 12689477. The reversal of 12689438 is 83498621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12689438² = 322043673511688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12689395 and 12689404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31208 + ... + 31611.

It is an arithmetic number, because the mean of its divisors is an integer number (2402865).

Almost surely, 2^12689438 is an apocalyptic number.

12689438 is a deficient number, since it is larger than the sum of its proper divisors (6533482).

12689438 is a wasteful number, since it uses less digits than its factorization.

12689438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62922.

The product of its digits is 82944, while the sum is 41.

The square root of 12689438 is about 3562.2237436747. The cubic root of 12689438 is about 233.2459595764.

The spelling of 12689438 in words is "twelve million, six hundred eighty-nine thousand, four hundred thirty-eight".