16639168 has 56 divisors (see below), whose sum is σ = 40652192. Its totient is φ = 6580224.

The previous prime is 16639163. The next prime is 16639171. The reversal of 16639168 is 86193661.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 16639168.

It is not an unprimeable number, because it can be changed into a prime (16639163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4396 + ... + 7252.

It is an arithmetic number, because the mean of its divisors is an integer number (725932).

Almost surely, 2^16639168 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 16639168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20326096).

16639168 is an abundant number, since it is smaller than the sum of its proper divisors (24013024).

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

16639168 is a wasteful number, since it uses less digits than its factorization.

16639168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889 (or 2879 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 16639168 is about 4079.1136292092. The cubic root of 16639168 is about 255.2959168806.

It can be divided in two parts, 16639 and 168, that added together give a 5-th power (16807 = 7⁵).

The spelling of 16639168 in words is "sixteen million, six hundred thirty-nine thousand, one hundred sixty-eight".