16985688 has 64 divisors (see below), whose sum is σ = 44140800. Its totient is φ = 5443200.

The previous prime is 16985663. The next prime is 16985699. The reversal of 16985688 is 88658961.

It is a self number, because there is not a number n which added to its sum of digits gives 16985688.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112413 + ... + 112563.

It is an arithmetic number, because the mean of its divisors is an integer number (689700).

Almost surely, 2^16985688 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 16985688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22070400).

16985688 is an abundant number, since it is smaller than the sum of its proper divisors (27155112).

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

16985688 is a wasteful number, since it uses less digits than its factorization.

16985688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 308 counting only the distinct ones).

The product of its digits is 829440, while the sum is 51.

The square root of 16985688 is about 4121.3696752415. The cubic root of 16985688 is about 257.0559815872.

The spelling of 16985688 in words is "sixteen million, nine hundred eighty-five thousand, six hundred eighty-eight".