8638587136 has 81 divisors (see below), whose sum is σ = 17835662439. Its totient is φ = 4175788032.

The previous prime is 8638587109. The next prime is 8638587149. The reversal of 8638587136 is 6317858368.

The square root of 8638587136 is 92944.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 495329536 + 8143257600 = 22256^2 + 90240^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 55022770 + ... + 55022926.

Almost surely, 2^8638587136 is an apocalyptic number.

8638587136 is the 92944-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8638587136

8638587136 is an abundant number, since it is smaller than the sum of its proper divisors (9197075303).

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

8638587136 is an frugal number, since it uses more digits than its factorization.

8638587136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 196 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The cubic root of 8638587136 is about 2051.8592797547.

The spelling of 8638587136 in words is "eight billion, six hundred thirty-eight million, five hundred eighty-seven thousand, one hundred thirty-six".