1680608980 has 12 divisors (see below), whose sum is σ = 3529278900. Its totient is φ = 672243584.

The previous prime is 1680608927. The next prime is 1680608981. The reversal of 1680608980 is 898060861.

It can be written as a sum of positive squares in 2 ways, for example, as 1247219856 + 433389124 = 35316^2 + 20818^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1680608980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680608981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42015205 + ... + 42015244.

It is an arithmetic number, because the mean of its divisors is an integer number (294106575).

Almost surely, 2^1680608980 is an apocalyptic number.

1680608980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1680608980 is an abundant number, since it is smaller than the sum of its proper divisors (1848669920).

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

1680608980 is a wasteful number, since it uses less digits than its factorization.

1680608980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84030458 (or 84030456 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 1680608980 is about 40995.2311860782. The cubic root of 1680608980 is about 1188.9280132633.

The spelling of 1680608980 in words is "one billion, six hundred eighty million, six hundred eight thousand, nine hundred eighty".