320987308 has 12 divisors (see below), whose sum is σ = 569639952. Its totient is φ = 158233040.

The previous prime is 320987281. The next prime is 320987309. The reversal of 320987308 is 803789023.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (320987309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564835 + ... + 565402.

It is an arithmetic number, because the mean of its divisors is an integer number (47469996).

Almost surely, 2^320987308 is an apocalyptic number.

It is an amenable number.

320987308 is a deficient number, since it is larger than the sum of its proper divisors (248652644).

320987308 is a wasteful number, since it uses less digits than its factorization.

320987308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130312 (or 1130310 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 320987308 is about 17916.1186644876. The cubic root of 320987308 is about 684.6931035060.

The spelling of 320987308 in words is "three hundred twenty million, nine hundred eighty-seven thousand, three hundred eight".