1680494860 has 96 divisors (see below), whose sum is σ = 3971358720. Its totient is φ = 591955200.

The previous prime is 1680494831. The next prime is 1680494887. The reversal of 1680494860 is 684940861.

It is a self number, because there is not a number n which added to its sum of digits gives 1680494860.

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 31 ways as a sum of consecutive naturals, for example, 3508101 + ... + 3508579.

It is an arithmetic number, because the mean of its divisors is an integer number (41368320).

Almost surely, 2^1680494860 is an apocalyptic number.

1680494860 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 1680494860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1985679360).

1680494860 is an abundant number, since it is smaller than the sum of its proper divisors (2290863860).

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

1680494860 is a wasteful number, since it uses less digits than its factorization.

1680494860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 965 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 1680494860 is about 40993.8392932401. The cubic root of 1680494860 is about 1188.9011016819.

The spelling of 1680494860 in words is "one billion, six hundred eighty million, four hundred ninety-four thousand, eight hundred sixty".