1680773880 has 128 divisors (see below), whose sum is σ = 5258649600. Its totient is φ = 429230592.

The previous prime is 1680773873. The next prime is 1680773891. The reversal of 1680773880 is 883770861.

It is a congruent number.

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, 440059 + ... + 443861.

It is an arithmetic number, because the mean of its divisors is an integer number (41083200).

Almost surely, 2^1680773880 is an apocalyptic number.

1680773880 is a gapful number since it is divisible by the number (10) 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 1680773880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2629324800).

1680773880 is an abundant number, since it is smaller than the sum of its proper divisors (3577875720).

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

1680773880 is a wasteful number, since it uses less digits than its factorization.

1680773880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973 (or 3969 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 1680773880 is about 40997.2423462847. The cubic root of 1680773880 is about 1188.9668975447.

The spelling of 1680773880 in words is "one billion, six hundred eighty million, seven hundred seventy-three thousand, eight hundred eighty".