320424020 has 48 divisors (see below), whose sum is σ = 787788288. Its totient is φ = 107178240.

The previous prime is 320424011. The next prime is 320424031. The reversal of 320424020 is 20424023.

It is a super-3 number, since 3×320424020³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320424020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22172 + ... + 33651.

It is an arithmetic number, because the mean of its divisors is an integer number (16412256).

Almost surely, 2^320424020 is an apocalyptic number.

It is an amenable number.

320424020 is an abundant number, since it is smaller than the sum of its proper divisors (467364268).

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

320424020 is a wasteful number, since it uses less digits than its factorization.

320424020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55880 (or 55878 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 320424020 is about 17900.3916158279. The cubic root of 320424020 is about 684.2923553310.

Adding to 320424020 its reverse (20424023), we get a palindrome (340848043).

The spelling of 320424020 in words is "three hundred twenty million, four hundred twenty-four thousand, twenty".