16685844 has 24 divisors (see below), whose sum is σ = 44495808. Its totient is φ = 4767360.

The previous prime is 16685839. The next prime is 16685861. The reversal of 16685844 is 44858661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 16685796 and 16685805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99237 + ... + 99404.

It is an arithmetic number, because the mean of its divisors is an integer number (1853992).

Almost surely, 2^16685844 is an apocalyptic number.

16685844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16685844 is an abundant number, since it is smaller than the sum of its proper divisors (27809964).

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

16685844 is a wasteful number, since it uses less digits than its factorization.

16685844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198655 (or 198653 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 16685844 is about 4084.8309634549. The cubic root of 16685844 is about 255.5344117212.

The spelling of 16685844 in words is "sixteen million, six hundred eighty-five thousand, eight hundred forty-four".