12643896 has 16 divisors (see below), whose sum is σ = 31609800. Its totient is φ = 4214624.

The previous prime is 12643889. The next prime is 12643901. The reversal of 12643896 is 69834621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263391 + ... + 263438.

Almost surely, 2^12643896 is an apocalyptic number.

It is an amenable number.

12643896 is an abundant number, since it is smaller than the sum of its proper divisors (18965904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12643896 is a wasteful number, since it uses less digits than its factorization.

12643896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526838 (or 526834 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 12643896 is about 3555.8256425196. The cubic root of 12643896 is about 232.9665875818.

The spelling of 12643896 in words is "twelve million, six hundred forty-three thousand, eight hundred ninety-six".