8439678720 has 216 divisors, whose sum is σ = 31855470192. Its totient is φ = 2045952000.

The previous prime is 8439678703. The next prime is 8439678727. The reversal of 8439678720 is 278769348.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8439678727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93420 + ... + 160020.

Almost surely, 2^8439678720 is an apocalyptic number.

8439678720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8439678720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15927735096).

8439678720 is an abundant number, since it is smaller than the sum of its proper divisors (23415791472).

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

8439678720 is a wasteful number, since it uses less digits than its factorization.

8439678720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66639 (or 66622 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The square root of 8439678720 is about 91867.7240384239. The cubic root of 8439678720 is about 2035.9884256904.

The spelling of 8439678720 in words is "eight billion, four hundred thirty-nine million, six hundred seventy-eight thousand, seven hundred twenty".