16990976 has 36 divisors (see below), whose sum is σ = 35025984. Its totient is φ = 8217600.

The previous prime is 16990913. The next prime is 16990993. The reversal of 16990976 is 67909961.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16990976.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6866 + ... + 9006.

It is an arithmetic number, because the mean of its divisors is an integer number (972944).

Almost surely, 2^16990976 is an apocalyptic number.

16990976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16990976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17512992).

16990976 is an abundant number, since it is smaller than the sum of its proper divisors (18035008).

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

16990976 is an equidigital number, since it uses as much as digits as its factorization.

16990976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 2174 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 16990976 is about 4122.0111596161. The cubic root of 16990976 is about 257.0826544543.

The spelling of 16990976 in words is "sixteen million, nine hundred ninety thousand, nine hundred seventy-six".