16809344 has 32 divisors (see below), whose sum is σ = 34314840. Its totient is φ = 8197120.

The previous prime is 16809323. The next prime is 16809349. The reversal of 16809344 is 44390861.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16809349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3647 + ... + 6849.

Almost surely, 2^16809344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16809344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17157420).

16809344 is an abundant number, since it is smaller than the sum of its proper divisors (17505496).

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

16809344 is an equidigital number, since it uses as much as digits as its factorization.

16809344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258 (or 3246 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 16809344 is about 4099.9199992195. The cubic root of 16809344 is about 256.1633072594.

The spelling of 16809344 in words is "sixteen million, eight hundred nine thousand, three hundred forty-four".