320312232 has 80 divisors (see below), whose sum is σ = 949978260. Its totient is φ = 100486656.

The previous prime is 320312227. The next prime is 320312233. The reversal of 320312232 is 232213023.

It is a happy number.

320312232 is a `hidden beast` number, since 320 + 312 + 2 + 32 = 666.

320312232 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 290566116 + 29746116 = 17046^2 + 5454^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (320312233) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3523 + ... + 25554.

Almost surely, 2^320312232 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 320312232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474989130).

320312232 is an abundant number, since it is smaller than the sum of its proper divisors (629666028).

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

320312232 is a wasteful number, since it uses less digits than its factorization.

320312232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29112 (or 29099 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 320312232 is about 17897.2688419211. The cubic root of 320312232 is about 684.2127685266.

Adding to 320312232 its reverse (232213023), we get a palindrome (552525255).

The spelling of 320312232 in words is "three hundred twenty million, three hundred twelve thousand, two hundred thirty-two".