9928651 has 4 divisors (see below), whose sum is σ = 9988272. Its totient is φ = 9869032.

The previous prime is 9928619. The next prime is 9928661. The reversal of 9928651 is 1568299.

9928651 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1568299 = 107 ⋅14657.

It is not a de Polignac number, because 9928651 - 2⁵ = 9928619 is a prime.

It is a super-2 number, since 2×9928651² = 197156221359602, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9928661) 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 3 ways as a sum of consecutive naturals, for example, 29560 + ... + 29893.

It is an arithmetic number, because the mean of its divisors is an integer number (2497068).

Almost surely, 2^9928651 is an apocalyptic number.

9928651 is a deficient number, since it is larger than the sum of its proper divisors (59621).

9928651 is a wasteful number, since it uses less digits than its factorization.

9928651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59620.

The product of its digits is 38880, while the sum is 40.

The square root of 9928651 is about 3150.9761979425. The cubic root of 9928651 is about 214.9298563321.

The spelling of 9928651 in words is "nine million, nine hundred twenty-eight thousand, six hundred fifty-one".