9728859 has 16 divisors (see below), whose sum is σ = 15141888. Its totient is φ = 5440512.

The previous prime is 9728843. The next prime is 9728861. The reversal of 9728859 is 9588279.

It is a happy number.

It is not a de Polignac number, because 9728859 - 2⁴ = 9728843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9728899) 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 15 ways as a sum of consecutive naturals, for example, 3942 + ... + 5915.

It is an arithmetic number, because the mean of its divisors is an integer number (946368).

Almost surely, 2^9728859 is an apocalyptic number.

9728859 is a deficient number, since it is larger than the sum of its proper divisors (5413029).

9728859 is a wasteful number, since it uses less digits than its factorization.

9728859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9914.

The product of its digits is 362880, while the sum is 48.

The square root of 9728859 is about 3119.1118928310. Note that the first 3 decimals coincide. The cubic root of 9728859 is about 213.4784150380.

The spelling of 9728859 in words is "nine million, seven hundred twenty-eight thousand, eight hundred fifty-nine".