320400343 has 8 divisors (see below), whose sum is σ = 339433200. Its totient is φ = 301388160.

The previous prime is 320400329. The next prime is 320400371. The reversal of 320400343 is 343004023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320400343 - 2¹³ = 320392151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320400343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320400383) 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 7 ways as a sum of consecutive naturals, for example, 36333 + ... + 44281.

It is an arithmetic number, because the mean of its divisors is an integer number (42429150).

Almost surely, 2^320400343 is an apocalyptic number.

320400343 is a deficient number, since it is larger than the sum of its proper divisors (19032857).

320400343 is a wasteful number, since it uses less digits than its factorization.

320400343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 320400343 is about 17899.7302493641. The cubic root of 320400343 is about 684.2755001764.

Adding to 320400343 its reverse (343004023), we get a palindrome (663404366).

The spelling of 320400343 in words is "three hundred twenty million, four hundred thousand, three hundred forty-three".