323320520 has 64 divisors (see below), whose sum is σ = 747187200. Its totient is φ = 125856000.

The previous prime is 323320513. The next prime is 323320523. The reversal of 323320520 is 25023323.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 323320492 and 323320501.

It is not an unprimeable number, because it can be changed into a prime (323320523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430145 + ... + 430895.

It is an arithmetic number, because the mean of its divisors is an integer number (11674800).

Almost surely, 2^323320520 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 323320520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373593600).

323320520 is an abundant number, since it is smaller than the sum of its proper divisors (423866680).

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

323320520 is a wasteful number, since it uses less digits than its factorization.

323320520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 323320520 is about 17981.1156494807. The cubic root of 323320520 is about 686.3480796067.

Adding to 323320520 its reverse (25023323), we get a palindrome (348343843).

The spelling of 323320520 in words is "three hundred twenty-three million, three hundred twenty thousand, five hundred twenty".