320440311 has 12 divisors (see below), whose sum is σ = 463937760. Its totient is φ = 213128640.

The previous prime is 320440277. The next prime is 320440319. The reversal of 320440311 is 113044023.

It is not a de Polignac number, because 320440311 - 2⁶ = 320440247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320440319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37426 + ... + 45183.

It is an arithmetic number, because the mean of its divisors is an integer number (38661480).

Almost surely, 2^320440311 is an apocalyptic number.

320440311 is a deficient number, since it is larger than the sum of its proper divisors (143497449).

320440311 is a wasteful number, since it uses less digits than its factorization.

320440311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83046 (or 83043 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 320440311 is about 17900.8466559546. The cubic root of 320440311 is about 684.3039520665.

Adding to 320440311 its reverse (113044023), we get a palindrome (433484334).

The spelling of 320440311 in words is "three hundred twenty million, four hundred forty thousand, three hundred eleven".