1680869688 has 32 divisors (see below), whose sum is σ = 4209974160. Its totient is φ = 559249920.

The previous prime is 1680869681. The next prime is 1680869731. The reversal of 1680869688 is 8869680861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680869681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51745 + ... + 77712.

Almost surely, 2^1680869688 is an apocalyptic number.

It is an amenable number.

1680869688 is an abundant number, since it is smaller than the sum of its proper divisors (2529104472).

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

1680869688 is a wasteful number, since it uses less digits than its factorization.

1680869688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130007 (or 130003 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 60.

The square root of 1680869688 is about 40998.4107984688. The cubic root of 1680869688 is about 1188.9894884035.

The spelling of 1680869688 in words is "one billion, six hundred eighty million, eight hundred sixty-nine thousand, six hundred eighty-eight".