324544640 has 192 divisors, whose sum is σ = 920937600. Its totient is φ = 109025280.

The previous prime is 324544639. The next prime is 324544687. The reversal of 324544640 is 46445423.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 324544597 and 324544606.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2477375 + ... + 2477505.

It is an arithmetic number, because the mean of its divisors is an integer number (4796550).

Almost surely, 2^324544640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 324544640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (460468800).

324544640 is an abundant number, since it is smaller than the sum of its proper divisors (596392960).

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

324544640 is a wasteful number, since it uses less digits than its factorization.

324544640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 32.

The square root of 324544640 is about 18015.1225363582. The cubic root of 324544640 is about 687.2131801923.

The spelling of 324544640 in words is "three hundred twenty-four million, five hundred forty-four thousand, six hundred forty".