438313864789 has 16 divisors (see below), whose sum is σ = 468950812848. Its totient is φ = 408217485312.

The previous prime is 438313864787. The next prime is 438313864853. The reversal of 438313864789 is 987468313834.

It can be written as a sum of positive squares in 8 ways, for example, as 23281571889 + 415032292900 = 152583^2 + 644230^2 .

It is a cyclic number.

It is not a de Polignac number, because 438313864789 - 2¹ = 438313864787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 438313864789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438313864787) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14319469 + ... + 14350045.

It is an arithmetic number, because the mean of its divisors is an integer number (29309425803).

Almost surely, 2^438313864789 is an apocalyptic number.

It is an amenable number.

438313864789 is a deficient number, since it is larger than the sum of its proper divisors (30636948059).

438313864789 is a wasteful number, since it uses less digits than its factorization.

438313864789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39384.

The product of its digits is 83607552, while the sum is 64.

The spelling of 438313864789 in words is "four hundred thirty-eight billion, three hundred thirteen million, eight hundred sixty-four thousand, seven hundred eighty-nine".