320878394 has 8 divisors (see below), whose sum is σ = 488096928. Its totient is φ = 158179420.

The previous prime is 320878391. The next prime is 320878399. The reversal of 320878394 is 493878023.

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

It is not an unprimeable number, because it can be changed into a prime (320878391) 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, 1129712 + ... + 1129995.

It is an arithmetic number, because the mean of its divisors is an integer number (61012116).

Almost surely, 2^320878394 is an apocalyptic number.

320878394 is a deficient number, since it is larger than the sum of its proper divisors (167218534).

320878394 is a wasteful number, since it uses less digits than its factorization.

320878394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259780.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 320878394 is about 17913.0788531732. The cubic root of 320878394 is about 684.6156538179.

The spelling of 320878394 in words is "three hundred twenty million, eight hundred seventy-eight thousand, three hundred ninety-four".