9494478728 has 64 divisors (see below), whose sum is σ = 20975136000. Its totient is φ = 4027000320.

The previous prime is 9494478713. The next prime is 9494478731. The reversal of 9494478728 is 8278744949.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248333 + ... + 284003.

It is an arithmetic number, because the mean of its divisors is an integer number (327736500).

Almost surely, 2^9494478728 is an apocalyptic number.

9494478728 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9494478728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10487568000).

9494478728 is an abundant number, since it is smaller than the sum of its proper divisors (11480657272).

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

9494478728 is a wasteful number, since it uses less digits than its factorization.

9494478728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35795 (or 35777 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 62.

The square root of 9494478728 is about 97439.6158038403. The cubic root of 9494478728 is about 2117.5014120155.

The spelling of 9494478728 in words is "nine billion, four hundred ninety-four million, four hundred seventy-eight thousand, seven hundred twenty-eight".