9728609 has 8 divisors (see below), whose sum is σ = 11074752. Its totient is φ = 8459440.

The previous prime is 9728597. The next prime is 9728611. The reversal of 9728609 is 9068279.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9728609 - 2²⁰ = 8680033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9728639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18974 + ... + 19479.

It is an arithmetic number, because the mean of its divisors is an integer number (1384344).

Almost surely, 2^9728609 is an apocalyptic number.

It is an amenable number.

9728609 is a deficient number, since it is larger than the sum of its proper divisors (1346143).

9728609 is a wasteful number, since it uses less digits than its factorization.

9728609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38487.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 9728609 is about 3119.0718170635. The cubic root of 9728609 is about 213.4765864556.

The spelling of 9728609 in words is "nine million, seven hundred twenty-eight thousand, six hundred nine".