5638210868 has 12 divisors (see below), whose sum is σ = 9895143300. Its totient is φ = 2811027072.

The previous prime is 5638210859. The next prime is 5638210889. The reversal of 5638210868 is 8680128365.

It can be written as a sum of positive squares in 2 ways, for example, as 4447822864 + 1190388004 = 66692^2 + 34502^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2018021 + ... + 2020812.

It is an arithmetic number, because the mean of its divisors is an integer number (824595275).

Almost surely, 2^5638210868 is an apocalyptic number.

It is an amenable number.

5638210868 is a deficient number, since it is larger than the sum of its proper divisors (4256932432).

5638210868 is a wasteful number, since it uses less digits than its factorization.

5638210868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039186 (or 4039184 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 5638210868 is about 75088.0208022558. The cubic root of 5638210868 is about 1779.8378495561.

The spelling of 5638210868 in words is "five billion, six hundred thirty-eight million, two hundred ten thousand, eight hundred sixty-eight".