16640008 has 96 divisors (see below), whose sum is σ = 42107040. Its totient is φ = 6074880.

The previous prime is 16640003. The next prime is 16640023. The reversal of 16640008 is 80004661.

16640008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16640003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73191 + ... + 73417.

It is an arithmetic number, because the mean of its divisors is an integer number (438615).

Almost surely, 2^16640008 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 16640008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21053520).

16640008 is an abundant number, since it is smaller than the sum of its proper divisors (25467032).

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

16640008 is a wasteful number, since it uses less digits than its factorization.

16640008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 16640008 is about 4079.2165914548. The cubic root of 16640008 is about 255.3002128679.

Adding to 16640008 its reverse (80004661), we get a palindrome (96644669).

The spelling of 16640008 in words is "sixteen million, six hundred forty thousand, eight".