4438909657 has 12 divisors (see below), whose sum is σ = 5560832676. Its totient is φ = 3512103840.

The previous prime is 4438909639. The next prime is 4438909669. The reversal of 4438909657 is 7569098344.

4438909657 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1819107801 + 2619801856 = 42651^2 + 51184^2 .

It is not a de Polignac number, because 4438909657 - 2¹⁵ = 4438876889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4438909598 and 4438909607.

It is not an unprimeable number, because it can be changed into a prime (4438909697) 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 11 ways as a sum of consecutive naturals, for example, 3483594 + ... + 3484867.

It is an arithmetic number, because the mean of its divisors is an integer number (463402723).

Almost surely, 2^4438909657 is an apocalyptic number.

It is an amenable number.

4438909657 is a deficient number, since it is larger than the sum of its proper divisors (1121923019).

4438909657 is a wasteful number, since it uses less digits than its factorization.

4438909657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6968488 (or 6968481 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The square root of 4438909657 is about 66625.1428291152. The cubic root of 4438909657 is about 1643.4586013985.

The spelling of 4438909657 in words is "four billion, four hundred thirty-eight million, nine hundred nine thousand, six hundred fifty-seven".