8643889882 has 16 divisors (see below), whose sum is σ = 13001338152. Its totient is φ = 4310127360.

The previous prime is 8643889879. The next prime is 8643889889. The reversal of 8643889882 is 2889883468.

It can be written as a sum of positive squares in 4 ways, for example, as 7118128161 + 1525761721 = 84369^2 + 39061^2 .

It is not an unprimeable number, because it can be changed into a prime (8643889889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1271332 + ... + 1278112.

Almost surely, 2^8643889882 is an apocalyptic number.

8643889882 is a deficient number, since it is larger than the sum of its proper divisors (4357448270).

8643889882 is a wasteful number, since it uses less digits than its factorization.

8643889882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8433.

The product of its digits is 42467328, while the sum is 64.

The square root of 8643889882 is about 92972.5221880099. The cubic root of 8643889882 is about 2052.2790344695.

The spelling of 8643889882 in words is "eight billion, six hundred forty-three million, eight hundred eighty-nine thousand, eight hundred eighty-two".