1689868 has 12 divisors (see below), whose sum is σ = 3131352. Its totient is φ = 795200.

The previous prime is 1689847. The next prime is 1689869. The reversal of 1689868 is 8689861.

It is not an unprimeable number, because it can be changed into a prime (1689869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12358 + ... + 12493.

It is an arithmetic number, because the mean of its divisors is an integer number (260946).

2^1689868 is an apocalyptic number.

It is an amenable number.

1689868 is a deficient number, since it is larger than the sum of its proper divisors (1441484).

1689868 is a wasteful number, since it uses less digits than its factorization.

1689868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24872 (or 24870 counting only the distinct ones).

The product of its digits is 165888, while the sum is 46.

The square root of 1689868 is about 1299.9492297778. The cubic root of 1689868 is about 119.1107412501.

The spelling of 1689868 in words is "one million, six hundred eighty-nine thousand, eight hundred sixty-eight".