320378916 has 48 divisors (see below), whose sum is σ = 878246208. Its totient is φ = 89616000.

The previous prime is 320378897. The next prime is 320378941. The reversal of 320378916 is 619873023.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91635 + ... + 95066.

It is an arithmetic number, because the mean of its divisors is an integer number (18296796).

Almost surely, 2^320378916 is an apocalyptic number.

It is an amenable number.

320378916 is an abundant number, since it is smaller than the sum of its proper divisors (557867292).

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

320378916 is a wasteful number, since it uses less digits than its factorization.

320378916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186732 (or 186730 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 320378916 is about 17899.1317107842. The cubic root of 320378916 is about 684.2602460333.

The spelling of 320378916 in words is "three hundred twenty million, three hundred seventy-eight thousand, nine hundred sixteen".