43180728138 has 24 divisors (see below), whose sum is σ = 98482363200. Its totient is φ = 13636019304.

The previous prime is 43180728133. The next prime is 43180728139. The reversal of 43180728138 is 83182708134.

43180728138 is a `hidden beast` number, since 431 + 80 + 7 + 2 + 8 + 138 = 666.

43180728138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 43180728093 and 43180728102.

It is not an unprimeable number, because it can be changed into a prime (43180728133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63129378 + ... + 63130061.

It is an arithmetic number, because the mean of its divisors is an integer number (4103431800).

Almost surely, 2^43180728138 is an apocalyptic number.

43180728138 is an abundant number, since it is smaller than the sum of its proper divisors (55301635062).

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

43180728138 is a wasteful number, since it uses less digits than its factorization.

43180728138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126259466 (or 126259463 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 43180728138 in words is "forty-three billion, one hundred eighty million, seven hundred twenty-eight thousand, one hundred thirty-eight".