320023552 has 44 divisors (see below), whose sum is σ = 650700360. Its totient is φ = 157270016.

The previous prime is 320023547. The next prime is 320023553. The reversal of 320023552 is 255320023.

It is not an unprimeable number, because it can be changed into a prime (320023553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57768 + ... + 63064.

Almost surely, 2^320023552 is an apocalyptic number.

320023552 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 320023552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325350180).

320023552 is an abundant number, since it is smaller than the sum of its proper divisors (330676808).

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

320023552 is an equidigital number, since it uses as much as digits as its factorization.

320023552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5376 (or 5358 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 320023552 is about 17889.2021062986. The cubic root of 320023552 is about 684.0071588230.

Adding to 320023552 its reverse (255320023), we get a palindrome (575343575).

The spelling of 320023552 in words is "three hundred twenty million, twenty-three thousand, five hundred fifty-two".