9728144 has 20 divisors (see below), whose sum is σ = 19034496. Its totient is φ = 4816032.

The previous prime is 9728143. The next prime is 9728153. The reversal of 9728144 is 4418279.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9728143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1304 + ... + 4599.

Almost surely, 2^9728144 is an apocalyptic number.

It is an amenable number.

9728144 is a deficient number, since it is larger than the sum of its proper divisors (9306352).

9728144 is a wasteful number, since it uses less digits than its factorization.

9728144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6014 (or 6008 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 9728144 is about 3118.9972747664. The cubic root of 9728144 is about 213.4731852090.

The spelling of 9728144 in words is "nine million, seven hundred twenty-eight thousand, one hundred forty-four".