1689698088 has 96 divisors (see below), whose sum is σ = 5021420040. Its totient is φ = 510082560.

The previous prime is 1689698071. The next prime is 1689698089. The reversal of 1689698088 is 8808969861.

It can be written as a sum of positive squares in 4 ways, for example, as 715134564 + 974563524 = 26742^2 + 31218^2 .

It is not an unprimeable number, because it can be changed into a prime (1689698089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32578 + ... + 66638.

Almost surely, 2^1689698088 is an apocalyptic number.

1689698088 is a gapful number since it is divisible by the number (18) 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 1689698088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2510710020).

1689698088 is an abundant number, since it is smaller than the sum of its proper divisors (3331721952).

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

1689698088 is a wasteful number, since it uses less digits than its factorization.

1689698088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34139 (or 34132 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 63.

The square root of 1689698088 is about 41105.9373813565. The cubic root of 1689698088 is about 1191.0674902061.

The spelling of 1689698088 in words is "one billion, six hundred eighty-nine million, six hundred ninety-eight thousand, eighty-eight".