1680442568 has 32 divisors (see below), whose sum is σ = 3644343360. Its totient is φ = 711510720.

The previous prime is 1680442541. The next prime is 1680442627. The reversal of 1680442568 is 8652440861.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 176123 + ... + 185418.

It is an arithmetic number, because the mean of its divisors is an integer number (113885730).

Almost surely, 2^1680442568 is an apocalyptic number.

It is an amenable number.

1680442568 is an abundant number, since it is smaller than the sum of its proper divisors (1963900792).

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

1680442568 is a wasteful number, since it uses less digits than its factorization.

1680442568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361637 (or 361633 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 44.

The square root of 1680442568 is about 40993.2014851243. The cubic root of 1680442568 is about 1188.8887698657. Note that the first 3 decimals are identical.

The spelling of 1680442568 in words is "one billion, six hundred eighty million, four hundred forty-two thousand, five hundred sixty-eight".