9994600728 has 192 divisors, whose sum is σ = 31947888960. Its totient is φ = 2763030528.

The previous prime is 9994600697. The next prime is 9994600739. The reversal of 9994600728 is 8270064999.

9994600728 is a `hidden beast` number, since 9 + 9 + 9 + 4 + 600 + 7 + 28 = 666.

It is a Cunningham number, because it is equal to 99973²-1.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3597676 + ... + 3600452.

It is an arithmetic number, because the mean of its divisors is an integer number (166395255).

Almost surely, 2^9994600728 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 9994600728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15973944480).

9994600728 is an abundant number, since it is smaller than the sum of its proper divisors (21953288232).

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

9994600728 is a wasteful number, since it uses less digits than its factorization.

9994600728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026 (or 3019 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 9994600728 is about 99972.9999949986. Note that the first 5 decimals coincide. The cubic root of 9994600728 is about 2154.0468742628.

The spelling of 9994600728 in words is "nine billion, nine hundred ninety-four million, six hundred thousand, seven hundred twenty-eight".