438515047236 has 96 divisors (see below), whose sum is σ = 1196978872320. Its totient is φ = 122344458624.

The previous prime is 438515047231. The next prime is 438515047249. The reversal of 438515047236 is 632740515834.

It is a super-2 number, since 2×438515047236² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (438515047231) 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, 1606666 + ... + 1859678.

It is an arithmetic number, because the mean of its divisors is an integer number (12468529920).

Almost surely, 2^438515047236 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 438515047236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598489436160).

438515047236 is an abundant number, since it is smaller than the sum of its proper divisors (758463825084).

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

438515047236 is a wasteful number, since it uses less digits than its factorization.

438515047236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253513 (or 253511 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 438515047236 in words is "four hundred thirty-eight billion, five hundred fifteen million, forty-seven thousand, two hundred thirty-six".