16444445 has 4 divisors (see below), whose sum is σ = 19733340. Its totient is φ = 13155552.

The previous prime is 16444433. The next prime is 16444453. The reversal of 16444445 is 54444461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7166329 + 9278116 = 2677^2 + 3046^2 .

It is a cyclic number.

It is not a de Polignac number, because 16444445 - 2⁴ = 16444429 is a prime.

It is a congruent number.

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, 1644440 + ... + 1644449.

It is an arithmetic number, because the mean of its divisors is an integer number (4933335).

Almost surely, 2^16444445 is an apocalyptic number.

It is an amenable number.

16444445 is a deficient number, since it is larger than the sum of its proper divisors (3288895).

16444445 is an equidigital number, since it uses as much as digits as its factorization.

16444445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288894.

The product of its digits is 30720, while the sum is 32.

The square root of 16444445 is about 4055.1750886984. The cubic root of 16444445 is about 254.2961237255.

It can be divided in two parts, 1 and 6444445, that added together give a palindrome (6444446).

The spelling of 16444445 in words is "sixteen million, four hundred forty-four thousand, four hundred forty-five".