12643448 has 8 divisors (see below), whose sum is σ = 23706480. Its totient is φ = 6321720.

The previous prime is 12643447. The next prime is 12643453. The reversal of 12643448 is 84434621.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643447) by changing a digit.

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 as a sum of consecutive naturals, namely, 790208 + ... + 790223.

It is an arithmetic number, because the mean of its divisors is an integer number (2963310).

Almost surely, 2^12643448 is an apocalyptic number.

It is an amenable number.

12643448 is a deficient number, since it is larger than the sum of its proper divisors (11063032).

12643448 is a wasteful number, since it uses less digits than its factorization.

12643448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580437 (or 1580433 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 12643448 is about 3555.7626467468. The cubic root of 12643448 is about 232.9638360495.

The spelling of 12643448 in words is "twelve million, six hundred forty-three thousand, four hundred forty-eight".