438658645236 has 96 divisors (see below), whose sum is σ = 1194174938880. Its totient is φ = 122724086784.

The previous prime is 438658645231. The next prime is 438658645319. The reversal of 438658645236 is 632546856834.

438658645236 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 438658645236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438658645231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2169280 + ... + 2362856.

It is an arithmetic number, because the mean of its divisors is an integer number (12439322280).

Almost surely, 2^438658645236 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 438658645236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597087469440).

438658645236 is an abundant number, since it is smaller than the sum of its proper divisors (755516293644).

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

438658645236 is a wasteful number, since it uses less digits than its factorization.

438658645236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194153 (or 194151 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 60.

The spelling of 438658645236 in words is "four hundred thirty-eight billion, six hundred fifty-eight million, six hundred forty-five thousand, two hundred thirty-six".