9928745 has 8 divisors (see below), whose sum is σ = 12020616. Its totient is φ = 7872256.

The previous prime is 9928741. The next prime is 9928747. The reversal of 9928745 is 5478299.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 94249 + 9834496 = 307^2 + 3136^2 .

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 9928745 - 2² = 9928741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9928696 and 9928705.

It is not an unprimeable number, because it can be changed into a prime (9928741) 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, 8222 + ... + 9351.

It is an arithmetic number, because the mean of its divisors is an integer number (1502577).

Almost surely, 2^9928745 is an apocalyptic number.

It is an amenable number.

9928745 is a deficient number, since it is larger than the sum of its proper divisors (2091871).

9928745 is a wasteful number, since it uses less digits than its factorization.

9928745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17691.

The product of its digits is 181440, while the sum is 44.

The square root of 9928745 is about 3150.9911139196. The cubic root of 9928745 is about 214.9305346164.

The spelling of 9928745 in words is "nine million, nine hundred twenty-eight thousand, seven hundred forty-five".