320440332 has 48 divisors (see below), whose sum is σ = 765041760. Its totient is φ = 104352768.

The previous prime is 320440319. The next prime is 320440391. The reversal of 320440332 is 233044023.

It is a junction number, because it is equal to n+sod(n) for n = 320440299 and 320440308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170148 + ... + 172020.

It is an arithmetic number, because the mean of its divisors is an integer number (15938370).

Almost surely, 2^320440332 is an apocalyptic number.

It is an amenable number.

320440332 is an abundant number, since it is smaller than the sum of its proper divisors (444601428).

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

320440332 is a wasteful number, since it uses less digits than its factorization.

320440332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2200 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 320440332 is about 17900.8472425190. The cubic root of 320440332 is about 684.3039670151.

Adding to 320440332 its reverse (233044023), we get a palindrome (553484355).

The spelling of 320440332 in words is "three hundred twenty million, four hundred forty thousand, three hundred thirty-two".