1689369138 has 24 divisors (see below), whose sum is σ = 3661834176. Its totient is φ = 562887000.

The previous prime is 1689369133. The next prime is 1689369163. The reversal of 1689369138 is 8319639861.

It is not an unprimeable number, because it can be changed into a prime (1689369133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27523 + ... + 64313.

It is an arithmetic number, because the mean of its divisors is an integer number (152576424).

Almost surely, 2^1689369138 is an apocalyptic number.

1689369138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1689369138 is an abundant number, since it is smaller than the sum of its proper divisors (1972465038).

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

1689369138 is a wasteful number, since it uses less digits than its factorization.

1689369138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39350 (or 39347 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 1689369138 is about 41101.9359398070. The cubic root of 1689369138 is about 1190.9901929497.

The spelling of 1689369138 in words is "one billion, six hundred eighty-nine million, three hundred sixty-nine thousand, one hundred thirty-eight".