8642278008 has 192 divisors, whose sum is σ = 29239042560. Its totient is φ = 2245148928.

The previous prime is 8642277949. The next prime is 8642278033. The reversal of 8642278008 is 8008722468.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 429141 + ... + 448827.

It is an arithmetic number, because the mean of its divisors is an integer number (152286680).

Almost surely, 2^8642278008 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 8642278008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14619521280).

8642278008 is an abundant number, since it is smaller than the sum of its proper divisors (20596764552).

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

8642278008 is a wasteful number, since it uses less digits than its factorization.

8642278008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19786 (or 19779 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 8642278008 is about 92963.8532333939. The cubic root of 8642278008 is about 2052.1514599283.

The spelling of 8642278008 in words is "eight billion, six hundred forty-two million, two hundred seventy-eight thousand, eight".