8318478438 has 64 divisors (see below), whose sum is σ = 18960177600. Its totient is φ = 2701797120.

The previous prime is 8318478383. The next prime is 8318478461. The reversal of 8318478438 is 8348748138.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2240928 + ... + 2244636.

It is an arithmetic number, because the mean of its divisors is an integer number (296252775).

Almost surely, 2^8318478438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8318478438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9480088800).

8318478438 is an abundant number, since it is smaller than the sum of its proper divisors (10641699162).

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

8318478438 is a wasteful number, since it uses less digits than its factorization.

8318478438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4774 (or 4768 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 54.

The square root of 8318478438 is about 91205.6930131009. The cubic root of 8318478438 is about 2026.1952756826.

The spelling of 8318478438 in words is "eight billion, three hundred eighteen million, four hundred seventy-eight thousand, four hundred thirty-eight".