320523424 has 48 divisors (see below), whose sum is σ = 687832992. Its totient is φ = 146135808.

The previous prime is 320523397. The next prime is 320523431. The reversal of 320523424 is 424325023.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29887 + ... + 39169.

It is an arithmetic number, because the mean of its divisors is an integer number (14329854).

Almost surely, 2^320523424 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 320523424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343916496).

320523424 is an abundant number, since it is smaller than the sum of its proper divisors (367309568).

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

320523424 is a wasteful number, since it uses less digits than its factorization.

320523424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9389 (or 9381 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 320523424 is about 17903.1679878171. The cubic root of 320523424 is about 684.3631098731.

Adding to 320523424 its reverse (424325023), we get a palindrome (744848447).

The spelling of 320523424 in words is "three hundred twenty million, five hundred twenty-three thousand, four hundred twenty-four".