16990445 has 8 divisors (see below), whose sum is σ = 21275136. Its totient is φ = 13001296.

The previous prime is 16990439. The next prime is 16990447. The reversal of 16990445 is 54409961.

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

It is a cyclic number.

It is not a de Polignac number, because 16990445 - 2⁶ = 16990381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16990399 and 16990408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16990447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73757 + ... + 73986.

It is an arithmetic number, because the mean of its divisors is an integer number (2659392).

Almost surely, 2^16990445 is an apocalyptic number.

It is an amenable number.

16990445 is a deficient number, since it is larger than the sum of its proper divisors (4284691).

16990445 is a wasteful number, since it uses less digits than its factorization.

16990445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147771.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 16990445 is about 4121.9467488069. The cubic root of 16990445 is about 257.0799763207.

The spelling of 16990445 in words is "sixteen million, nine hundred ninety thousand, four hundred forty-five".