1689197188 has 72 divisors (see below), whose sum is σ = 3626163072. Its totient is φ = 685149696.

The previous prime is 1689197183. The next prime is 1689197201. The reversal of 1689197188 is 8817919861.

It is not an unprimeable number, because it can be changed into a prime (1689197183) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 435345 + ... + 439207.

It is an arithmetic number, because the mean of its divisors is an integer number (50363376).

Almost surely, 2^1689197188 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 1689197188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813081536).

1689197188 is an abundant number, since it is smaller than the sum of its proper divisors (1936965884).

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

1689197188 is a wasteful number, since it uses less digits than its factorization.

1689197188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001 (or 3992 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 58.

The square root of 1689197188 is about 41099.8441359575. The cubic root of 1689197188 is about 1190.9497838392.

The spelling of 1689197188 in words is "one billion, six hundred eighty-nine million, one hundred ninety-seven thousand, one hundred eighty-eight".