9726428784 has 160 divisors (see below), whose sum is σ = 27223257600. Its totient is φ = 2983214080.

The previous prime is 9726428779. The next prime is 9726428819. The reversal of 9726428784 is 4878246279.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14759047 + ... + 14759705.

It is an arithmetic number, because the mean of its divisors is an integer number (170145360).

Almost surely, 2^9726428784 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 9726428784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13611628800).

9726428784 is an abundant number, since it is smaller than the sum of its proper divisors (17496828816).

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

9726428784 is a wasteful number, since it uses less digits than its factorization.

9726428784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1177 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 57.

The square root of 9726428784 is about 98622.6585729669. The cubic root of 9726428784 is about 2134.6063830919.

The spelling of 9726428784 in words is "nine billion, seven hundred twenty-six million, four hundred twenty-eight thousand, seven hundred eighty-four".