1689030 has 72 divisors (see below), whose sum is σ = 5121792. Its totient is φ = 385056.

The previous prime is 1688987. The next prime is 1689031. The reversal of 1689030 is 309861.

It is a junction number, because it is equal to n+sod(n) for n = 1688985 and 1689003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4219 + ... + 4601.

It is an arithmetic number, because the mean of its divisors is an integer number (71136).

2^1689030 is an apocalyptic number.

1689030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1689030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2560896).

1689030 is an abundant number, since it is smaller than the sum of its proper divisors (3432762).

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

1689030 is a wasteful number, since it uses less digits than its factorization.

1689030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1689030 is about 1299.6268695283. The cubic root of 1689030 is about 119.0910491193.

The spelling of 1689030 in words is "one million, six hundred eighty-nine thousand, thirty".