320433020 has 12 divisors (see below), whose sum is σ = 672909384. Its totient is φ = 128173200.

The previous prime is 320432971. The next prime is 320433031. The reversal of 320433020 is 20334023.

It is a self number, because there is not a number n which added to its sum of digits gives 320433020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8010806 + ... + 8010845.

It is an arithmetic number, because the mean of its divisors is an integer number (56075782).

Almost surely, 2^320433020 is an apocalyptic number.

It is an amenable number.

320433020 is an abundant number, since it is smaller than the sum of its proper divisors (352476364).

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

320433020 is a wasteful number, since it uses less digits than its factorization.

320433020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16021660 (or 16021658 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 320433020 is about 17900.6430052107. The cubic root of 320433020 is about 684.2987620225.

Adding to 320433020 its reverse (20334023), we get a palindrome (340767043).

The spelling of 320433020 in words is "three hundred twenty million, four hundred thirty-three thousand, twenty".