1680105828 has 24 divisors (see below), whose sum is σ = 3934407232. Its totient is φ = 558012384.

The previous prime is 1680105793. The next prime is 1680105839. The reversal of 1680105828 is 8285010861.

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 7 ways as a sum of consecutive naturals, for example, 249400 + ... + 256047.

Almost surely, 2^1680105828 is an apocalyptic number.

It is an amenable number.

1680105828 is an abundant number, since it is smaller than the sum of its proper divisors (2254301404).

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

1680105828 is a wasteful number, since it uses less digits than its factorization.

1680105828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505731 (or 505729 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 39.

The square root of 1680105828 is about 40989.0940129201. The cubic root of 1680105828 is about 1188.8093516703.

The spelling of 1680105828 in words is "one billion, six hundred eighty million, one hundred five thousand, eight hundred twenty-eight".