9438945128 has 16 divisors (see below), whose sum is σ = 17701601760. Its totient is φ = 4718518000.

The previous prime is 9438945127. The next prime is 9438945149. The reversal of 9438945128 is 8215498349.

It is a self number, because there is not a number n which added to its sum of digits gives 9438945128.

It is not an unprimeable number, because it can be changed into a prime (9438945127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76388 + ... + 157203.

It is an arithmetic number, because the mean of its divisors is an integer number (1106350110).

Almost surely, 2^9438945128 is an apocalyptic number.

It is an amenable number.

9438945128 is a deficient number, since it is larger than the sum of its proper divisors (8262656632).

9438945128 is a wasteful number, since it uses less digits than its factorization.

9438945128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238648 (or 238644 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The square root of 9438945128 is about 97154.2337111461. The cubic root of 9438945128 is about 2113.3648853926.

The spelling of 9438945128 in words is "nine billion, four hundred thirty-eight million, nine hundred forty-five thousand, one hundred twenty-eight".