9273745728 has 560 divisors, whose sum is σ = 32053840896. Its totient is φ = 2627665920.

The previous prime is 9273745721. The next prime is 9273745753. The reversal of 9273745728 is 8275473729.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9273745721) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 48050400 + ... + 48050592.

Almost surely, 2^9273745728 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 9273745728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16026920448).

9273745728 is an abundant number, since it is smaller than the sum of its proper divisors (22780095168).

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

9273745728 is a wasteful number, since it uses less digits than its factorization.

9273745728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 265 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The square root of 9273745728 is about 96300.2893453597. The cubic root of 9273745728 is about 2100.9629542885.

The spelling of 9273745728 in words is "nine billion, two hundred seventy-three million, seven hundred forty-five thousand, seven hundred twenty-eight".