12646438 has 16 divisors (see below), whose sum is σ = 22821120. Its totient is φ = 5134536.

The previous prime is 12646427. The next prime is 12646463. The reversal of 12646438 is 83464621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23506 + ... + 24037.

It is an arithmetic number, because the mean of its divisors is an integer number (1426320).

Almost surely, 2^12646438 is an apocalyptic number.

12646438 is a deficient number, since it is larger than the sum of its proper divisors (10174682).

12646438 is a wasteful number, since it uses less digits than its factorization.

12646438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47571.

The product of its digits is 27648, while the sum is 34.

The square root of 12646438 is about 3556.1830661539. The cubic root of 12646438 is about 232.9821988402.

It can be divided in two parts, 126 and 46438, that added together give a palindrome (46564).

The spelling of 12646438 in words is "twelve million, six hundred forty-six thousand, four hundred thirty-eight".