16990680 has 128 divisors (see below), whose sum is σ = 59097600. Its totient is φ = 3827712.

The previous prime is 16990679. The next prime is 16990691. The reversal of 16990680 is 8609961.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94831 + ... + 95009.

It is an arithmetic number, because the mean of its divisors is an integer number (461700).

Almost surely, 2^16990680 is an apocalyptic number.

16990680 is a gapful number since it is divisible by the number (10) 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 16990680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29548800).

16990680 is an abundant number, since it is smaller than the sum of its proper divisors (42106920).

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

16990680 is a wasteful number, since it uses less digits than its factorization.

16990680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 16990680 is about 4121.9752546564. The cubic root of 16990680 is about 257.0811615656.

The spelling of 16990680 in words is "sixteen million, nine hundred ninety thousand, six hundred eighty".