9194725728 has 72 divisors (see below), whose sum is σ = 26211767400. Its totient is φ = 3057375744.

The previous prime is 9194725721. The next prime is 9194725741. The reversal of 9194725728 is 8275274919.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9194725721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78763 + ... + 156821.

It is an arithmetic number, because the mean of its divisors is an integer number (364052325).

Almost surely, 2^9194725728 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 9194725728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13105883700).

9194725728 is an abundant number, since it is smaller than the sum of its proper divisors (17017041672).

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

9194725728 is a wasteful number, since it uses less digits than its factorization.

9194725728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78484 (or 78473 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 9194725728 is about 95889.1324812150. The cubic root of 9194725728 is about 2094.9786095336.

The spelling of 9194725728 in words is "nine billion, one hundred ninety-four million, seven hundred twenty-five thousand, seven hundred twenty-eight".