320018389 has 8 divisors (see below), whose sum is σ = 335984832. Its totient is φ = 304223040.

The previous prime is 320018359. The next prime is 320018429. The reversal of 320018389 is 983810023.

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 320018389 - 2¹⁵ = 319985621 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 (320018359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38932 + ... + 46429.

It is an arithmetic number, because the mean of its divisors is an integer number (41998104).

Almost surely, 2^320018389 is an apocalyptic number.

It is an amenable number.

320018389 is a deficient number, since it is larger than the sum of its proper divisors (15966443).

320018389 is a wasteful number, since it uses less digits than its factorization.

320018389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85547.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 320018389 is about 17889.0578007898. The cubic root of 320018389 is about 684.0034803979.

The spelling of 320018389 in words is "three hundred twenty million, eighteen thousand, three hundred eighty-nine".