9728939 has 8 divisors (see below), whose sum is σ = 10637568. Its totient is φ = 8824360.

The previous prime is 9728933. The next prime is 9728941. The reversal of 9728939 is 9398279.

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 9728939 - 2¹² = 9724843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9728893 and 9728902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9728933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6434 + ... + 7800.

It is an arithmetic number, because the mean of its divisors is an integer number (1329696).

Almost surely, 2^9728939 is an apocalyptic number.

9728939 is a deficient number, since it is larger than the sum of its proper divisors (908629).

9728939 is a wasteful number, since it uses less digits than its factorization.

9728939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025.

The product of its digits is 244944, while the sum is 47.

The square root of 9728939 is about 3119.1247169679. The cubic root of 9728939 is about 213.4790001777.

The spelling of 9728939 in words is "nine million, seven hundred twenty-eight thousand, nine hundred thirty-nine".