680021208 has 96 divisors (see below), whose sum is σ = 1911936000. Its totient is φ = 218116800.

The previous prime is 680021171. The next prime is 680021213. The reversal of 680021208 is 802120086.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 443403 + ... + 444933.

It is an arithmetic number, because the mean of its divisors is an integer number (19916000).

Almost surely, 2^680021208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680021208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (955968000).

680021208 is an abundant number, since it is smaller than the sum of its proper divisors (1231914792).

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

680021208 is a wasteful number, since it uses less digits than its factorization.

680021208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773 (or 1766 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 680021208 is about 26077.2162624771. The cubic root of 680021208 is about 879.3750762938.

The spelling of 680021208 in words is "six hundred eighty million, twenty-one thousand, two hundred eight".