438526117820 has 96 divisors (see below), whose sum is σ = 1059484769280. Its totient is φ = 149350487040.

The previous prime is 438526117819. The next prime is 438526117871. The reversal of 438526117820 is 28711625834.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 24474665 + ... + 24492575.

It is an arithmetic number, because the mean of its divisors is an integer number (11036299680).

Almost surely, 2^438526117820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438526117820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529742384640).

438526117820 is an abundant number, since it is smaller than the sum of its proper divisors (620958651460).

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

438526117820 is a wasteful number, since it uses less digits than its factorization.

438526117820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19083 (or 19081 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 438526117820 in words is "four hundred thirty-eight billion, five hundred twenty-six million, one hundred seventeen thousand, eight hundred twenty".