320820378 has 16 divisors (see below), whose sum is σ = 643075200. Its totient is φ = 106701056.

The previous prime is 320820371. The next prime is 320820391. The reversal of 320820378 is 873028023.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (320820371) 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, 56850 + ... + 62237.

It is an arithmetic number, because the mean of its divisors is an integer number (40192200).

Almost surely, 2^320820378 is an apocalyptic number.

320820378 is an abundant number, since it is smaller than the sum of its proper divisors (322254822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320820378 is a wasteful number, since it uses less digits than its factorization.

320820378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119541.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 320820378 is about 17911.4594045265. The cubic root of 320820378 is about 684.5743909838.

The spelling of 320820378 in words is "three hundred twenty million, eight hundred twenty thousand, three hundred seventy-eight".