680221320 has 128 divisors (see below), whose sum is σ = 2187267840. Its totient is φ = 168791040.

The previous prime is 680221279. The next prime is 680221351. The reversal of 680221320 is 23122086.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98790 + ... + 105450.

It is an arithmetic number, because the mean of its divisors is an integer number (17088030).

Almost surely, 2^680221320 is an apocalyptic number.

680221320 is a gapful number since it is divisible by the number (60) 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 680221320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093633920).

680221320 is an abundant number, since it is smaller than the sum of its proper divisors (1507046520).

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

680221320 is a wasteful number, since it uses less digits than its factorization.

680221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6735 (or 6731 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 680221320 is about 26081.0528928569. The cubic root of 680221320 is about 879.4613266659.

The spelling of 680221320 in words is "six hundred eighty million, two hundred twenty-one thousand, three hundred twenty".