9728665 has 8 divisors (see below), whose sum is σ = 12288960. Its totient is φ = 7373232.

The previous prime is 9728651. The next prime is 9728681. The reversal of 9728665 is 5668279.

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

It is a cyclic number.

It is not a de Polignac number, because 9728665 - 2⁹ = 9728153 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51109 + ... + 51298.

It is an arithmetic number, because the mean of its divisors is an integer number (1536120).

Almost surely, 2^9728665 is an apocalyptic number.

9728665 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9728665 is a deficient number, since it is larger than the sum of its proper divisors (2560295).

9728665 is a wasteful number, since it uses less digits than its factorization.

9728665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102431.

The product of its digits is 181440, while the sum is 43.

The square root of 9728665 is about 3119.0807940802. The cubic root of 9728665 is about 213.4769960608.

The spelling of 9728665 in words is "nine million, seven hundred twenty-eight thousand, six hundred sixty-five".