324320644 has 12 divisors (see below), whose sum is σ = 567705600. Its totient is φ = 162119048.

The previous prime is 324320641. The next prime is 324320693. The reversal of 324320644 is 446023423.

It is not an unprimeable number, because it can be changed into a prime (324320641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13437 + ... + 28795.

It is an arithmetic number, because the mean of its divisors is an integer number (47308800).

Almost surely, 2^324320644 is an apocalyptic number.

It is an amenable number.

324320644 is a deficient number, since it is larger than the sum of its proper divisors (243384956).

324320644 is a wasteful number, since it uses less digits than its factorization.

324320644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20642 (or 20640 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

The square root of 324320644 is about 18008.9045752372. The cubic root of 324320644 is about 687.0550422844.

The spelling of 324320644 in words is "three hundred twenty-four million, three hundred twenty thousand, six hundred forty-four".