12866944 has 16 divisors (see below), whose sum is σ = 25633620. Its totient is φ = 6433408.

The previous prime is 12866941. The next prime is 12866947. The reversal of 12866944 is 44966821.

It is an interprime number because it is at equal distance from previous prime (12866941) and next prime (12866947).

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 12866897 and 12866906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12866941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50134 + ... + 50389.

Almost surely, 2^12866944 is an apocalyptic number.

It is an amenable number.

12866944 is a deficient number, since it is larger than the sum of its proper divisors (12766676).

12866944 is an equidigital number, since it uses as much as digits as its factorization.

12866944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100537 (or 100525 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 12866944 is about 3587.0522717128. The cubic root of 12866944 is about 234.3285131862.

The spelling of 12866944 in words is "twelve million, eight hundred sixty-six thousand, nine hundred forty-four".