320920394 has 8 divisors (see below), whose sum is σ = 485055648. Its totient is φ = 159235180.

The previous prime is 320920361. The next prime is 320920399. The reversal of 320920394 is 493029023.

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

It is a self number, because there is not a number n which added to its sum of digits gives 320920394.

It is not an unprimeable number, because it can be changed into a prime (320920399) 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, 612182 + ... + 612705.

It is an arithmetic number, because the mean of its divisors is an integer number (60631956).

Almost surely, 2^320920394 is an apocalyptic number.

320920394 is a deficient number, since it is larger than the sum of its proper divisors (164135254).

320920394 is a wasteful number, since it uses less digits than its factorization.

320920394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225020.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 320920394 is about 17914.2511425959. The cubic root of 320920394 is about 684.6455224572.

The spelling of 320920394 in words is "three hundred twenty million, nine hundred twenty thousand, three hundred ninety-four".