16682389 has 8 divisors (see below), whose sum is σ = 17700120. Its totient is φ = 15668736.

The previous prime is 16682381. The next prime is 16682401. The reversal of 16682389 is 98328661.

It can be written as a sum of positive squares in 4 ways, for example, as 3359889 + 13322500 = 1833^2 + 3650^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16682389 - 2³ = 16682381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16682381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13147 + ... + 14359.

It is an arithmetic number, because the mean of its divisors is an integer number (2212515).

Almost surely, 2^16682389 is an apocalyptic number.

It is an amenable number.

16682389 is a deficient number, since it is larger than the sum of its proper divisors (1017731).

16682389 is a wasteful number, since it uses less digits than its factorization.

16682389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039.

The product of its digits is 124416, while the sum is 43.

The square root of 16682389 is about 4084.4080354441. The cubic root of 16682389 is about 255.5167733699.

It can be divided in two parts, 16682 and 389, that added together give a palindrome (17071).

The spelling of 16682389 in words is "sixteen million, six hundred eighty-two thousand, three hundred eighty-nine".