1689320 has 32 divisors (see below), whose sum is σ = 3839400. Its totient is φ = 668928.

The previous prime is 1689319. The next prime is 1689343. The reversal of 1689320 is 239861.

It can be written as a sum of positive squares in 4 ways, for example, as 763876 + 925444 = 874^2 + 962^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6146 + ... + 6414.

2^1689320 is an apocalyptic number.

1689320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1689320 is an abundant number, since it is smaller than the sum of its proper divisors (2150080).

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

1689320 is a wasteful number, since it uses less digits than its factorization.

1689320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1689320 is about 1299.7384352246. The cubic root of 1689320 is about 119.0978645554.

The spelling of 1689320 in words is "one million, six hundred eighty-nine thousand, three hundred twenty".