1689066 has 32 divisors (see below), whose sum is σ = 3878400. Its totient is φ = 544320.

The previous prime is 1689053. The next prime is 1689067. The reversal of 1689066 is 6609861.

It is a self number, because there is not a number n which added to its sum of digits gives 1689066.

It is not an unprimeable number, because it can be changed into a prime (1689067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1170 + ... + 2178.

It is an arithmetic number, because the mean of its divisors is an integer number (121200).

2^1689066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1689066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1939200).

1689066 is an abundant number, since it is smaller than the sum of its proper divisors (2189334).

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

1689066 is a wasteful number, since it uses less digits than its factorization.

1689066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1689066 is about 1299.6407195837. The cubic root of 1689066 is about 119.0918952159.

The spelling of 1689066 in words is "one million, six hundred eighty-nine thousand, sixty-six".