321324320 has 24 divisors (see below), whose sum is σ = 759129084. Its totient is φ = 128529664.

The previous prime is 321324301. The next prime is 321324323. The reversal of 321324320 is 23423123.

It can be written as a sum of positive squares in 2 ways, for example, as 313006864 + 8317456 = 17692^2 + 2884^2 .

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 = 321324292 and 321324301.

It is not an unprimeable number, because it can be changed into a prime (321324323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1003979 + ... + 1004298.

Almost surely, 2^321324320 is an apocalyptic number.

It is an amenable number.

321324320 is an abundant number, since it is smaller than the sum of its proper divisors (437804764).

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

321324320 is a wasteful number, since it uses less digits than its factorization.

321324320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008292 (or 2008284 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 321324320 is about 17925.5214707969. The cubic root of 321324320 is about 684.9326447350.

Adding to 321324320 its reverse (23423123), we get a palindrome (344747443).

The spelling of 321324320 in words is "three hundred twenty-one million, three hundred twenty-four thousand, three hundred twenty".