12643662 has 32 divisors (see below), whose sum is σ = 26208000. Its totient is φ = 4063680.

The previous prime is 12643661. The next prime is 12643669. The reversal of 12643662 is 26634621.

12643662 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (10368) is a multiple of the sum of its prime divisors (648).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25089 + ... + 25587.

It is an arithmetic number, because the mean of its divisors is an integer number (819000).

Almost surely, 2^12643662 is an apocalyptic number.

12643662 is an abundant number, since it is smaller than the sum of its proper divisors (13564338).

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

12643662 is a wasteful number, since it uses less digits than its factorization.

12643662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its digits is 10368, while the sum is 30.

The square root of 12643662 is about 3555.7927386168. The cubic root of 12643662 is about 232.9651504056.

The spelling of 12643662 in words is "twelve million, six hundred forty-three thousand, six hundred sixty-two".