12643900 has 36 divisors (see below), whose sum is σ = 27607608. Its totient is φ = 5026240.

The previous prime is 12643889. The next prime is 12643901. The reversal of 12643900 is 934621.

12643900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22422 + ... + 22978.

It is an arithmetic number, because the mean of its divisors is an integer number (766878).

Almost surely, 2^12643900 is an apocalyptic number.

12643900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12643900 is an abundant number, since it is smaller than the sum of its proper divisors (14963708).

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

12643900 is a wasteful number, since it uses less digits than its factorization.

12643900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 12643900 is about 3555.8262049768. The cubic root of 12643900 is about 232.9666121487.

The spelling of 12643900 in words is "twelve million, six hundred forty-three thousand, nine hundred".