16990008 has 64 divisors (see below), whose sum is σ = 50664960. Its totient is φ = 4642176.

The previous prime is 16990007. The next prime is 16990019. The reversal of 16990008 is 80009961.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16990003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1666 + ... + 6062.

It is an arithmetic number, because the mean of its divisors is an integer number (791640).

Almost surely, 2^16990008 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 16990008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25332480).

16990008 is an abundant number, since it is smaller than the sum of its proper divisors (33674952).

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

16990008 is a wasteful number, since it uses less digits than its factorization.

16990008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436 (or 4432 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 16990008 is about 4121.8937395328. The cubic root of 16990008 is about 257.0777722404.

Adding to 16990008 its reverse (80009961), we get a palindrome (96999969).

The spelling of 16990008 in words is "sixteen million, nine hundred ninety thousand, eight".