320121320 has 16 divisors (see below), whose sum is σ = 720273060. Its totient is φ = 128048512.

The previous prime is 320121313. The next prime is 320121349. The reversal of 320121320 is 23121023.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 319622884 + 498436 = 17878^2 + 706^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320121295 and 320121304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4001477 + ... + 4001556.

Almost surely, 2^320121320 is an apocalyptic number.

It is an amenable number.

320121320 is an abundant number, since it is smaller than the sum of its proper divisors (400151740).

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

320121320 is a wasteful number, since it uses less digits than its factorization.

320121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8003044 (or 8003040 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 320121320 is about 17891.9344957442. The cubic root of 320121320 is about 684.0768070333.

Adding to 320121320 its reverse (23121023), we get a palindrome (343242343).

The spelling of 320121320 in words is "three hundred twenty million, one hundred twenty-one thousand, three hundred twenty".