324240640 has 108 divisors (see below), whose sum is σ = 800943444. Its totient is φ = 125755392.

The previous prime is 324240613. The next prime is 324240641. The reversal of 324240640 is 46042423.

It can be written as a sum of positive squares in 2 ways, for example, as 153363456 + 170877184 = 12384^2 + 13072^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (324240641) 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, 2366652 + ... + 2366788.

It is an arithmetic number, because the mean of its divisors is an integer number (7416143).

Almost surely, 2^324240640 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 324240640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400471722).

324240640 is an abundant number, since it is smaller than the sum of its proper divisors (476702804).

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

324240640 is an equidigital number, since it uses as much as digits as its factorization.

324240640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 324240640 is about 18006.6832037441. The cubic root of 324240640 is about 686.9985429803.

The spelling of 324240640 in words is "three hundred twenty-four million, two hundred forty thousand, six hundred forty".