320940312 has 64 divisors (see below), whose sum is σ = 1000339200. Its totient is φ = 83360640.

The previous prime is 320940307. The next prime is 320940313. The reversal of 320940312 is 213049023.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320940313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84987 + ... + 88682.

It is an arithmetic number, because the mean of its divisors is an integer number (15630300).

Almost surely, 2^320940312 is an apocalyptic number.

It is an amenable number.

320940312 is an abundant number, since it is smaller than the sum of its proper divisors (679398888).

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

320940312 is a wasteful number, since it uses less digits than its factorization.

320940312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173696 (or 173692 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 320940312 is about 17914.8070600830. The cubic root of 320940312 is about 684.6596863928.

Adding to 320940312 its reverse (213049023), we get a palindrome (533989335).

The spelling of 320940312 in words is "three hundred twenty million, nine hundred forty thousand, three hundred twelve".