8638829568 has 66 divisors (see below), whose sum is σ = 24944459514. Its totient is φ = 2879606784.

The previous prime is 8638829561. The next prime is 8638829569. The reversal of 8638829568 is 8659288368.

8638829568 is a `hidden beast` number, since 8 + 63 + 8 + 8 + 2 + 9 + 568 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6705644544 + 1933185024 = 81888^2 + 43968^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638829561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459471 + ... + 477902.

Almost surely, 2^8638829568 is an apocalyptic number.

It is an amenable number.

8638829568 is an abundant number, since it is smaller than the sum of its proper divisors (16305629946).

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

8638829568 is a wasteful number, since it uses less digits than its factorization.

8638829568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937399 (or 937378 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The square root of 8638829568 is about 92945.3041740141. The cubic root of 8638829568 is about 2051.8784739311.

The spelling of 8638829568 in words is "eight billion, six hundred thirty-eight million, eight hundred twenty-nine thousand, five hundred sixty-eight".