320991382 has 8 divisors (see below), whose sum is σ = 509809896. Its totient is φ = 151054752.

The previous prime is 320991379. The next prime is 320991383. The reversal of 320991382 is 283199023.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320991383) 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, 4720428 + ... + 4720495.

It is an arithmetic number, because the mean of its divisors is an integer number (63726237).

Almost surely, 2^320991382 is an apocalyptic number.

320991382 is a deficient number, since it is larger than the sum of its proper divisors (188818514).

320991382 is a wasteful number, since it uses less digits than its factorization.

320991382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9440942.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 320991382 is about 17916.2323606276. The cubic root of 320991382 is about 684.6960002227.

The spelling of 320991382 in words is "three hundred twenty million, nine hundred ninety-one thousand, three hundred eighty-two".