320390311 has 4 divisors (see below), whose sum is σ = 320429152. Its totient is φ = 320351472.

The previous prime is 320390309. The next prime is 320390327. The reversal of 320390311 is 113093023.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 320390311 - 2¹ = 320390309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320390341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1590 + ... + 25363.

It is an arithmetic number, because the mean of its divisors is an integer number (80107288).

Almost surely, 2^320390311 is an apocalyptic number.

320390311 is a deficient number, since it is larger than the sum of its proper divisors (38841).

320390311 is a wasteful number, since it uses less digits than its factorization.

320390311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38840.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 320390311 is about 17899.4500194838. The cubic root of 320390311 is about 684.2683583577.

The spelling of 320390311 in words is "three hundred twenty million, three hundred ninety thousand, three hundred eleven".