12644409 has 8 divisors (see below), whose sum is σ = 16915360. Its totient is φ = 8401536.

The previous prime is 12644393. The next prime is 12644459. The reversal of 12644409 is 90444621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12644409 - 2⁴ = 12644393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12644459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5944 + ... + 7785.

It is an arithmetic number, because the mean of its divisors is an integer number (2114420).

Almost surely, 2^12644409 is an apocalyptic number.

It is an amenable number.

12644409 is a deficient number, since it is larger than the sum of its proper divisors (4270951).

12644409 is a wasteful number, since it uses less digits than its factorization.

12644409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14039.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 12644409 is about 3555.8977769334. The cubic root of 12644409 is about 232.9697382521.

The spelling of 12644409 in words is "twelve million, six hundred forty-four thousand, four hundred nine".