438394437894 has 16 divisors (see below), whose sum is σ = 1002044429568. Its totient is φ = 125255553672.

The previous prime is 438394437893. The next prime is 438394437913. The reversal of 438394437894 is 498734493834.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438394437893) 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 7 ways as a sum of consecutive naturals, for example, 5218981362 + ... + 5218981445.

It is an arithmetic number, because the mean of its divisors is an integer number (62627776848).

Almost surely, 2^438394437894 is an apocalyptic number.

438394437894 is an abundant number, since it is smaller than the sum of its proper divisors (563649991674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438394437894 is a wasteful number, since it uses less digits than its factorization.

438394437894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10437962819.

The product of its digits is 250822656, while the sum is 66.

The spelling of 438394437894 in words is "four hundred thirty-eight billion, three hundred ninety-four million, four hundred thirty-seven thousand, eight hundred ninety-four".