320807816 has 32 divisors (see below), whose sum is σ = 727885440. Its totient is φ = 129401088.

The previous prime is 320807813. The next prime is 320807849. The reversal of 320807816 is 618708023.

It is not an unprimeable number, because it can be changed into a prime (320807813) 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 7 ways as a sum of consecutive naturals, for example, 167540 + ... + 169443.

It is an arithmetic number, because the mean of its divisors is an integer number (22746420).

Almost surely, 2^320807816 is an apocalyptic number.

It is an amenable number.

320807816 is an abundant number, since it is smaller than the sum of its proper divisors (407077624).

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

320807816 is a wasteful number, since it uses less digits than its factorization.

320807816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337013 (or 337009 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 320807816 is about 17911.1087317341. The cubic root of 320807816 is about 684.5654558326.

The spelling of 320807816 in words is "three hundred twenty million, eight hundred seven thousand, eight hundred sixteen".