3638944445 has 8 divisors (see below), whose sum is σ = 4468285536. Its totient is φ = 2843454096.

The previous prime is 3638944417. The next prime is 3638944459. The reversal of 3638944445 is 5444498363.

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 3638944445 - 2¹⁰ = 3638943421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3638944393 and 3638944402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8462447 + ... + 8462876.

It is an arithmetic number, because the mean of its divisors is an integer number (558535692).

Almost surely, 2^3638944445 is an apocalyptic number.

It is an amenable number.

3638944445 is a deficient number, since it is larger than the sum of its proper divisors (829341091).

3638944445 is a wasteful number, since it uses less digits than its factorization.

3638944445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16925371.

The product of its digits is 4976640, while the sum is 50.

The square root of 3638944445 is about 60323.6640548301. The cubic root of 3638944445 is about 1538.1256283074.

The spelling of 3638944445 in words is "three billion, six hundred thirty-eight million, nine hundred forty-four thousand, four hundred forty-five".