320501990 has 8 divisors (see below), whose sum is σ = 576903600. Its totient is φ = 128200792.

The previous prime is 320501989. The next prime is 320502031. The reversal of 320501990 is 99105023.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16025090 + ... + 16025109.

It is an arithmetic number, because the mean of its divisors is an integer number (72112950).

Almost surely, 2^320501990 is an apocalyptic number.

320501990 is a deficient number, since it is larger than the sum of its proper divisors (256401610).

320501990 is a wasteful number, since it uses less digits than its factorization.

320501990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32050206.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 320501990 is about 17902.5693686688. The cubic root of 320501990 is about 684.3478546533.

The spelling of 320501990 in words is "three hundred twenty million, five hundred one thousand, nine hundred ninety".