320340688 has 20 divisors (see below), whose sum is σ = 647646048. Its totient is φ = 153206240.

The previous prime is 320340679. The next prime is 320340689. The reversal of 320340688 is 886043023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320340689) 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, 434878 + ... + 435613.

Almost surely, 2^320340688 is an apocalyptic number.

It is an amenable number.

320340688 is an abundant number, since it is smaller than the sum of its proper divisors (327305360).

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

320340688 is a wasteful number, since it uses less digits than its factorization.

320340688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870522 (or 870516 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 320340688 is about 17898.0638058981. The cubic root of 320340688 is about 684.2330293639.

The spelling of 320340688 in words is "three hundred twenty million, three hundred forty thousand, six hundred eighty-eight".