9728685 has 24 divisors (see below), whose sum is σ = 17277624. Its totient is φ = 5061120.

The previous prime is 9728681. The next prime is 9728729. The reversal of 9728685 is 5868279.

9728685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12996 + 9715689 = 114^2 + 3117^2 .

It is not a de Polignac number, because 9728685 - 2² = 9728681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 9728685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9728681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 792 + ... + 4481.

It is an arithmetic number, because the mean of its divisors is an integer number (719901).

Almost surely, 2^9728685 is an apocalyptic number.

It is an amenable number.

9728685 is a deficient number, since it is larger than the sum of its proper divisors (7548939).

9728685 is a wasteful number, since it uses less digits than its factorization.

9728685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325 (or 5322 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 9728685 is about 3119.0840001513. The cubic root of 9728685 is about 213.4771423479.

It can be divided in two parts, 97 and 28685, that added together give a palindrome (28782).

The spelling of 9728685 in words is "nine million, seven hundred twenty-eight thousand, six hundred eighty-five".