320500680 has 64 divisors (see below), whose sum is σ = 964526400. Its totient is φ = 85198080.

The previous prime is 320500667. The next prime is 320500681. The reversal of 320500680 is 86005023.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 320500680.

It is not an unprimeable number, because it can be changed into a prime (320500681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35686 + ... + 43754.

It is an arithmetic number, because the mean of its divisors is an integer number (15070725).

Almost surely, 2^320500680 is an apocalyptic number.

320500680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320500680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482263200).

320500680 is an abundant number, since it is smaller than the sum of its proper divisors (644025720).

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

320500680 is a wasteful number, since it uses less digits than its factorization.

320500680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8414 (or 8410 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 320500680 is about 17902.5327817044. The cubic root of 320500680 is about 684.3469222650.

The spelling of 320500680 in words is "three hundred twenty million, five hundred thousand, six hundred eighty".