320440346 has 4 divisors (see below), whose sum is σ = 480660522. Its totient is φ = 160220172.

The previous prime is 320440319. The next prime is 320440391. The reversal of 320440346 is 643044023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 252460321 + 67980025 = 15889^2 + 8245^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80110085 + ... + 80110088.

Almost surely, 2^320440346 is an apocalyptic number.

320440346 is a deficient number, since it is larger than the sum of its proper divisors (160220176).

320440346 is a wasteful number, since it uses less digits than its factorization.

320440346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160220175.

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 320440346 is about 17900.8476335619. The cubic root of 320440346 is about 684.3039769808.

Adding to 320440346 its reverse (643044023), we get a palindrome (963484369).

The spelling of 320440346 in words is "three hundred twenty million, four hundred forty thousand, three hundred forty-six".