1689684080 has 160 divisors (see below), whose sum is σ = 4585849344. Its totient is φ = 567088128.

The previous prime is 1689684071. The next prime is 1689684131. The reversal of 1689684080 is 804869861.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 9766874 + ... + 9767046.

Almost surely, 2^1689684080 is an apocalyptic number.

1689684080 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 1689684080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2292924672).

1689684080 is an abundant number, since it is smaller than the sum of its proper divisors (2896165264).

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

1689684080 is a wasteful number, since it uses less digits than its factorization.

1689684080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 1689684080 is about 41105.7669919927. The cubic root of 1689684080 is about 1191.0641987858.

The spelling of 1689684080 in words is "one billion, six hundred eighty-nine million, six hundred eighty-four thousand, eighty".