9946438728 has 32 divisors (see below), whose sum is σ = 24919371360. Its totient is φ = 3308376320.

The previous prime is 9946438721. The next prime is 9946438739. The reversal of 9946438728 is 8278346499.

It is not an unprimeable number, because it can be changed into a prime (9946438721) 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, 432513 + ... + 454928.

It is an arithmetic number, because the mean of its divisors is an integer number (778730355).

Almost surely, 2^9946438728 is an apocalyptic number.

It is an amenable number.

9946438728 is an abundant number, since it is smaller than the sum of its proper divisors (14972932632).

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

9946438728 is a wasteful number, since it uses less digits than its factorization.

9946438728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887917 (or 887913 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 60.

The square root of 9946438728 is about 99731.8340751838. The cubic root of 9946438728 is about 2150.5813267053.

The spelling of 9946438728 in words is "nine billion, nine hundred forty-six million, four hundred thirty-eight thousand, seven hundred twenty-eight".