16441989 has 8 divisors (see below), whose sum is σ = 21954240. Its totient is φ = 10945536.

The previous prime is 16441961. The next prime is 16441991. The reversal of 16441989 is 98914461.

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

It is not a de Polignac number, because 16441989 - 2¹³ = 16433797 is a prime.

It is a super-3 number, since 3×16441989³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16441989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16441939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257 + ... + 5870.

It is an arithmetic number, because the mean of its divisors is an integer number (2744280).

Almost surely, 2^16441989 is an apocalyptic number.

It is an amenable number.

16441989 is a deficient number, since it is larger than the sum of its proper divisors (5512251).

16441989 is an equidigital number, since it uses as much as digits as its factorization.

16441989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7899.

The product of its digits is 62208, while the sum is 42.

The square root of 16441989 is about 4054.8722544613. The cubic root of 16441989 is about 254.2834632723.

The spelling of 16441989 in words is "sixteen million, four hundred forty-one thousand, nine hundred eighty-nine".