9273992728 has 256 divisors, whose sum is σ = 24969047040. Its totient is φ = 3133532160.

The previous prime is 9273992719. The next prime is 9273992731. The reversal of 9273992728 is 8272993729.

It is a super-2 number, since 2×9273992728² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16472175 + ... + 16472737.

It is an arithmetic number, because the mean of its divisors is an integer number (97535340).

Almost surely, 2^9273992728 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 9273992728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12484523520).

9273992728 is an abundant number, since it is smaller than the sum of its proper divisors (15695054312).

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

9273992728 is a wasteful number, since it uses less digits than its factorization.

9273992728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 613 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 58.

The square root of 9273992728 is about 96301.5717836422. The cubic root of 9273992728 is about 2100.9816067028.

It can be divided in two parts, 9273 and 992728, that added together give a palindrome (1002001).

The spelling of 9273992728 in words is "nine billion, two hundred seventy-three million, nine hundred ninety-two thousand, seven hundred twenty-eight".