320831020 has 12 divisors (see below), whose sum is σ = 673745184. Its totient is φ = 128332400.

The previous prime is 320831011. The next prime is 320831039. The reversal of 320831020 is 20138023.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8020756 + ... + 8020795.

It is an arithmetic number, because the mean of its divisors is an integer number (56145432).

Almost surely, 2^320831020 is an apocalyptic number.

It is an amenable number.

320831020 is an abundant number, since it is smaller than the sum of its proper divisors (352914164).

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

320831020 is a wasteful number, since it uses less digits than its factorization.

320831020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16041560 (or 16041558 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 320831020 is about 17911.7564744500. The cubic root of 320831020 is about 684.5819602870.

Adding to 320831020 its reverse (20138023), we get a palindrome (340969043).

The spelling of 320831020 in words is "three hundred twenty million, eight hundred thirty-one thousand, twenty".