9546449728 has 56 divisors (see below), whose sum is σ = 19172983752. Its totient is φ = 4715741184.

The previous prime is 9546449723. The next prime is 9546449741. The reversal of 9546449728 is 8279446459.

It can be written as a sum of positive squares in 4 ways, for example, as 123476544 + 9422973184 = 11112^2 + 97072^2 .

It is a super-2 number, since 2×9546449728² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9546449723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2435226 + ... + 2439142.

Almost surely, 2^9546449728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9546449728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9586491876).

9546449728 is an abundant number, since it is smaller than the sum of its proper divisors (9626534024).

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

9546449728 is a wasteful number, since it uses less digits than its factorization.

9546449728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379 (or 4369 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 58.

The square root of 9546449728 is about 97705.9349681482. The cubic root of 9546449728 is about 2121.3579860014.

The spelling of 9546449728 in words is "nine billion, five hundred forty-six million, four hundred forty-nine thousand, seven hundred twenty-eight".