16816389 has 8 divisors (see below), whose sum is σ = 23028000. Its totient is φ = 10907856.

The previous prime is 16816369. The next prime is 16816403. The reversal of 16816389 is 98361861.

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

It is not a de Polignac number, because 16816389 - 2⁸ = 16816133 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 16816389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16816369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75639 + ... + 75860.

It is an arithmetic number, because the mean of its divisors is an integer number (2878500).

Almost surely, 2^16816389 is an apocalyptic number.

It is an amenable number.

16816389 is a deficient number, since it is larger than the sum of its proper divisors (6211611).

16816389 is a wasteful number, since it uses less digits than its factorization.

16816389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151539.

The product of its digits is 62208, while the sum is 42.

The square root of 16816389 is about 4100.7790723227. The cubic root of 16816389 is about 256.1990893109.

It can be divided in two parts, 16816 and 389, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 16816389 in words is "sixteen million, eight hundred sixteen thousand, three hundred eighty-nine".