320023232 has 112 divisors (see below), whose sum is σ = 719267040. Its totient is φ = 140378112.

The previous prime is 320023217. The next prime is 320023307. The reversal of 320023232 is 232320023.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 320023232.

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, 2335868 + ... + 2336004.

Almost surely, 2^320023232 is an apocalyptic number.

320023232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320023232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359633520).

320023232 is an abundant number, since it is smaller than the sum of its proper divisors (399243808).

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

320023232 is a wasteful number, since it uses less digits than its factorization.

320023232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 288 counting only the distinct ones).

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

The square root of 320023232 is about 17889.1931623536. The cubic root of 320023232 is about 684.0069308373.

Adding to 320023232 its reverse (232320023), we get a palindrome (552343255).

The spelling of 320023232 in words is "three hundred twenty million, twenty-three thousand, two hundred thirty-two".