9728443694 has 4 divisors (see below), whose sum is σ = 14592665544. Its totient is φ = 4864221846.

The previous prime is 9728443687. The next prime is 9728443717. The reversal of 9728443694 is 4963448279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4963448279 = 139 ⋅35708261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2432110922 + ... + 2432110925.

It is an arithmetic number, because the mean of its divisors is an integer number (3648166386).

Almost surely, 2^9728443694 is an apocalyptic number.

9728443694 is a deficient number, since it is larger than the sum of its proper divisors (4864221850).

9728443694 is a wasteful number, since it uses less digits than its factorization.

9728443694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4864221849.

The product of its digits is 10450944, while the sum is 56.

The square root of 9728443694 is about 98632.8732928328. The cubic root of 9728443694 is about 2134.7537733581.

The spelling of 9728443694 in words is "nine billion, seven hundred twenty-eight million, four hundred forty-three thousand, six hundred ninety-four".