320755389 has 8 divisors (see below), whose sum is σ = 428176320. Its totient is φ = 213585696.

The previous prime is 320755343. The next prime is 320755433. The reversal of 320755389 is 983557023.

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

It is not a de Polignac number, because 320755389 - 2⁷ = 320755261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320755389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320755319) 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, 59809 + ... + 64950.

It is an arithmetic number, because the mean of its divisors is an integer number (53522040).

Almost surely, 2^320755389 is an apocalyptic number.

It is an amenable number.

320755389 is a deficient number, since it is larger than the sum of its proper divisors (107420931).

320755389 is a wasteful number, since it uses less digits than its factorization.

320755389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125619.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 320755389 is about 17909.6451388630. The cubic root of 320755389 is about 684.5281628215.

The spelling of 320755389 in words is "three hundred twenty million, seven hundred fifty-five thousand, three hundred eighty-nine".