40439644444 has 12 divisors (see below), whose sum is σ = 70828311568. Its totient is φ = 20202984000.

The previous prime is 40439644439. The next prime is 40439644537. The reversal of 40439644444 is 44444693404.

It is a junction number, because it is equal to n+sod(n) for n = 40439644394 and 40439644403.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4204152 + ... + 4213759.

Almost surely, 2^40439644444 is an apocalyptic number.

It is an amenable number.

40439644444 is a deficient number, since it is larger than the sum of its proper divisors (30388667124).

40439644444 is a wasteful number, since it uses less digits than its factorization.

40439644444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8419116 (or 8419114 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 46.

The spelling of 40439644444 in words is "forty billion, four hundred thirty-nine million, six hundred forty-four thousand, four hundred forty-four".