16990345 has 8 divisors (see below), whose sum is σ = 20465280. Its totient is φ = 13541040.

The previous prime is 16990343. The next prime is 16990357. The reversal of 16990345 is 54309961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16990345 - 2¹ = 16990343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16990343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4915 + ... + 7624.

It is an arithmetic number, because the mean of its divisors is an integer number (2558160).

Almost surely, 2^16990345 is an apocalyptic number.

It is an amenable number.

16990345 is a deficient number, since it is larger than the sum of its proper divisors (3474935).

16990345 is a wasteful number, since it uses less digits than its factorization.

16990345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12815.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 16990345 is about 4121.9346185984. The cubic root of 16990345 is about 257.0794719578.

The spelling of 16990345 in words is "sixteen million, nine hundred ninety thousand, three hundred forty-five".