1689199688 has 36 divisors (see below), whose sum is σ = 3483994185. Its totient is φ = 767236800.

The previous prime is 1689199643. The next prime is 1689199717. The reversal of 1689199688 is 8869919861.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1287517924 + 401681764 = 35882^2 + 20042^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=29062.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 1278068 + ... + 1279388.

Almost surely, 2^1689199688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1689199688

1689199688 is an abundant number, since it is smaller than the sum of its proper divisors (1794794497).

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

1689199688 is an equidigital number, since it uses as much as digits as its factorization.

1689199688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670 (or 1334 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 65.

The square root of 1689199688 is about 41099.8745496869. The cubic root of 1689199688 is about 1190.9503713714.

The spelling of 1689199688 in words is "one billion, six hundred eighty-nine million, one hundred ninety-nine thousand, six hundred eighty-eight".