1689306018 has 8 divisors (see below), whose sum is σ = 3378612048. Its totient is φ = 563102004.

The previous prime is 1689305993. The next prime is 1689306023. The reversal of 1689306018 is 8106039861.

It is a sphenic number, since it is the product of 3 distinct primes.

1689306018 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 140775496 + ... + 140775507.

It is an arithmetic number, because the mean of its divisors is an integer number (422326506).

Almost surely, 2^1689306018 is an apocalyptic number.

1689306018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1689306018 is a wasteful number, since it uses less digits than its factorization.

1689306018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281551008.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1689306018 is about 41101.1680855909. The cubic root of 1689306018 is about 1190.9753597524.

The spelling of 1689306018 in words is "one billion, six hundred eighty-nine million, three hundred six thousand, eighteen".