323120520 has 48 divisors (see below), whose sum is σ = 1050142860. Its totient is φ = 86165376.

The previous prime is 323120453. The next prime is 323120527. The reversal of 323120520 is 25021323.

323120520 is a `hidden beast` number, since 3 + 23 + 120 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 282441636 + 40678884 = 16806^2 + 6378^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 323120493 and 323120502.

It is not an unprimeable number, because it can be changed into a prime (323120527) 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, 448419 + ... + 449138.

Almost surely, 2^323120520 is an apocalyptic number.

323120520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

323120520 is an abundant number, since it is smaller than the sum of its proper divisors (727022340).

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

323120520 is a wasteful number, since it uses less digits than its factorization.

323120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897574 (or 897567 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 323120520 is about 17975.5533989916. The cubic root of 323120520 is about 686.2065297397.

Adding to 323120520 its reverse (25021323), we get a palindrome (348141843).

The spelling of 323120520 in words is "three hundred twenty-three million, one hundred twenty thousand, five hundred twenty".