438323227218 has 54 divisors (see below), whose sum is σ = 983760685167. Its totient is φ = 141043328160.

The previous prime is 438323227211. The next prime is 438323227249. The reversal of 438323227218 is 812722323834.

438323227218 is a `hidden beast` number, since 4 + 383 + 2 + 32 + 27 + 218 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 152683218009 + 285640009209 = 390747^2 + 534453^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=468147.

It is not an unprimeable number, because it can be changed into a prime (438323227211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 81454888 + ... + 81460268.

Almost surely, 2^438323227218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438323227218

438323227218 is an abundant number, since it is smaller than the sum of its proper divisors (545437457949).

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

438323227218 is an frugal number, since it uses more digits than its factorization.

438323227218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10828 (or 5415 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The spelling of 438323227218 in words is "four hundred thirty-eight billion, three hundred twenty-three million, two hundred twenty-seven thousand, two hundred eighteen".