8439378688 has 108 divisors (see below), whose sum is σ = 18438519288. Its totient is φ = 3853025280.

The previous prime is 8439378677. The next prime is 8439378709. The reversal of 8439378688 is 8868739348.

It is a super-2 number, since 2×8439378688² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4195603 + ... + 4197613.

Almost surely, 2^8439378688 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 8439378688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9219259644).

8439378688 is an abundant number, since it is smaller than the sum of its proper divisors (9999140600).

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

8439378688 is a wasteful number, since it uses less digits than its factorization.

8439378688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150 (or 2123 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 64.

The square root of 8439378688 is about 91866.0910673792. The cubic root of 8439378688 is about 2035.9642988273.

The spelling of 8439378688 in words is "eight billion, four hundred thirty-nine million, three hundred seventy-eight thousand, six hundred eighty-eight".