1680889688 has 32 divisors (see below), whose sum is σ = 3444716160. Its totient is φ = 765488640.

The previous prime is 1680889649. The next prime is 1680889699. The reversal of 1680889688 is 8869880861.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a self number, because there is not a number n which added to its sum of digits gives 1680889688.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 195131 + ... + 203562.

It is an arithmetic number, because the mean of its divisors is an integer number (107647380).

Almost surely, 2^1680889688 is an apocalyptic number.

It is an amenable number.

1680889688 is an abundant number, since it is smaller than the sum of its proper divisors (1763826472).

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

1680889688 is a wasteful number, since it uses less digits than its factorization.

1680889688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398747 (or 398743 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 62.

The square root of 1680889688 is about 40998.6547096365. The cubic root of 1680889688 is about 1188.9942041558.

The spelling of 1680889688 in words is "one billion, six hundred eighty million, eight hundred eighty-nine thousand, six hundred eighty-eight".