43638888868 has 24 divisors (see below), whose sum is σ = 76696687872. Its totient is φ = 21725620224.

The previous prime is 43638888851. The next prime is 43638888869. The reversal of 43638888868 is 86888883634.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 43638888797 and 43638888806.

It is not an unprimeable number, because it can be changed into a prime (43638888869) 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, 3001705 + ... + 3016207.

It is an arithmetic number, because the mean of its divisors is an integer number (3195695328).

Almost surely, 2^43638888868 is an apocalyptic number.

It is an amenable number.

43638888868 is a deficient number, since it is larger than the sum of its proper divisors (33057799004).

43638888868 is a wasteful number, since it uses less digits than its factorization.

43638888868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17691 (or 17689 counting only the distinct ones).

The product of its digits is 339738624, while the sum is 70.

The spelling of 43638888868 in words is "forty-three billion, six hundred thirty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-eight".