320402322320 has 20 divisors (see below), whose sum is σ = 744935399580. Its totient is φ = 128160928896.

The previous prime is 320402322283. The next prime is 320402322329. The reversal of 320402322320 is 23223204023.

It can be written as a sum of positive squares in 2 ways, for example, as 205974376336 + 114427945984 = 453844^2 + 338272^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (320402322329) 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, 2002514435 + ... + 2002514594.

It is an arithmetic number, because the mean of its divisors is an integer number (37246769979).

Almost surely, 2^320402322320 is an apocalyptic number.

It is an amenable number.

320402322320 is an abundant number, since it is smaller than the sum of its proper divisors (424533077260).

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

320402322320 is a wasteful number, since it uses less digits than its factorization.

320402322320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005029042 (or 4005029036 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 23.

Adding to 320402322320 its reverse (23223204023), we get a palindrome (343625526343).

The spelling of 320402322320 in words is "three hundred twenty billion, four hundred two million, three hundred twenty-two thousand, three hundred twenty".