12694644 has 30 divisors (see below), whose sum is σ = 33187154. Its totient is φ = 4231440.

The previous prime is 12694639. The next prime is 12694667. The reversal of 12694644 is 44649621.

12694644 is a `hidden beast` number, since 1 + 2 + 6 + 9 + 4 + 644 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12320100 + 374544 = 3510^2 + 612^2 .

It is a super-2 number, since 2×12694644² = 322307972573472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12694599 and 12694608.

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 9 ways as a sum of consecutive naturals, for example, 19267 + ... + 19914.

Almost surely, 2^12694644 is an apocalyptic number.

It is an amenable number.

12694644 is an abundant number, since it is smaller than the sum of its proper divisors (20492510).

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

12694644 is a wasteful number, since it uses less digits than its factorization.

12694644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39197 (or 39186 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 12694644 is about 3562.9543920741. The cubic root of 12694644 is about 233.2778525688.

The spelling of 12694644 in words is "twelve million, six hundred ninety-four thousand, six hundred forty-four".