8916218388 has 576 divisors, whose sum is σ = 31488737280. Its totient is φ = 2057529600.

The previous prime is 8916218383. The next prime is 8916218413. The reversal of 8916218388 is 8838126198.

8916218388 is a `hidden beast` number, since 8 + 9 + 1 + 621 + 8 + 3 + 8 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8916218383) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 70206381 + ... + 70206507.

Almost surely, 2^8916218388 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 8916218388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15744368640).

8916218388 is an abundant number, since it is smaller than the sum of its proper divisors (22572518892).

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

8916218388 is a wasteful number, since it uses less digits than its factorization.

8916218388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 243 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 54.

The square root of 8916218388 is about 94425.7294808994. The cubic root of 8916218388 is about 2073.6091429647.

It can be divided in two parts, 891621 and 8388, that added together give a palindrome (900009).

The spelling of 8916218388 in words is "eight billion, nine hundred sixteen million, two hundred eighteen thousand, three hundred eighty-eight".