320201920 has 56 divisors (see below), whose sum is σ = 764438400. Its totient is φ = 127752192.

The previous prime is 320201899. The next prime is 320201933. The reversal of 320201920 is 29102023.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152236 + ... + 154324.

Almost surely, 2^320201920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320201920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382219200).

320201920 is an abundant number, since it is smaller than the sum of its proper divisors (444236480).

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

320201920 is a wasteful number, since it uses less digits than its factorization.

320201920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585 (or 2575 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 320201920 is about 17894.1867655392. The cubic root of 320201920 is about 684.1342143978.

Adding to 320201920 its reverse (29102023), we get a palindrome (349303943).

The spelling of 320201920 in words is "three hundred twenty million, two hundred one thousand, nine hundred twenty".