9928555 has 16 divisors (see below), whose sum is σ = 14664384. Its totient is φ = 6284160.

The previous prime is 9928553. The next prime is 9928577. The reversal of 9928555 is 5558299.

It is not a de Polignac number, because 9928555 - 2¹ = 9928553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9928553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10456 + ... + 11365.

It is an arithmetic number, because the mean of its divisors is an integer number (916524).

Almost surely, 2^9928555 is an apocalyptic number.

9928555 is a deficient number, since it is larger than the sum of its proper divisors (4735829).

9928555 is a wasteful number, since it uses less digits than its factorization.

9928555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21846.

The product of its digits is 162000, while the sum is 43.

The square root of 9928555 is about 3150.9609645313. The cubic root of 9928555 is about 214.9291636119.

The spelling of 9928555 in words is "nine million, nine hundred twenty-eight thousand, five hundred fifty-five".