9872728 has 16 divisors (see below), whose sum is σ = 18815760. Its totient is φ = 4855200.

The previous prime is 9872717. The next prime is 9872729. The reversal of 9872728 is 8272789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9872729) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9628 + ... + 10603.

It is an arithmetic number, because the mean of its divisors is an integer number (1175985).

Almost surely, 2^9872728 is an apocalyptic number.

It is an amenable number.

9872728 is a deficient number, since it is larger than the sum of its proper divisors (8943032).

9872728 is a wasteful number, since it uses less digits than its factorization.

9872728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20298 (or 20294 counting only the distinct ones).

The product of its digits is 112896, while the sum is 43.

The square root of 9872728 is about 3142.0897504686. The cubic root of 9872728 is about 214.5255664362.

The spelling of 9872728 in words is "nine million, eight hundred seventy-two thousand, seven hundred twenty-eight".