12136644 has 36 divisors (see below), whose sum is σ = 33039916. Its totient is φ = 3734208.

The previous prime is 12136643. The next prime is 12136651. The reversal of 12136644 is 44663121.

12136644 is a `hidden beast` number, since 1 + 2 + 13 + 6 + 644 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2214144 + 9922500 = 1488^2 + 3150^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (12136643) 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, 12499 + ... + 13434.

Almost surely, 2^12136644 is an apocalyptic number.

It is an amenable number.

12136644 is an abundant number, since it is smaller than the sum of its proper divisors (20903272).

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

12136644 is a wasteful number, since it uses less digits than its factorization.

12136644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25956 (or 25951 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 12136644 is about 3483.7686490351. The cubic root of 12136644 is about 229.8085615591.

Adding to 12136644 its reverse (44663121), we get a palindrome (56799765).

The spelling of 12136644 in words is "twelve million, one hundred thirty-six thousand, six hundred forty-four".