9728147 has 12 divisors (see below), whose sum is σ = 11493864. Its totient is φ = 8161920.

The previous prime is 9728143. The next prime is 9728153. The reversal of 9728147 is 7418279.

It is not a de Polignac number, because 9728147 - 2² = 9728143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9728147.

It is not an unprimeable number, because it can be changed into a prime (9728143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 758 + ... + 4475.

It is an arithmetic number, because the mean of its divisors is an integer number (957822).

Almost surely, 2^9728147 is an apocalyptic number.

9728147 is a deficient number, since it is larger than the sum of its proper divisors (1765717).

9728147 is a wasteful number, since it uses less digits than its factorization.

9728147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5270 (or 5257 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 9728147 is about 3118.9977556901. The cubic root of 9728147 is about 213.4732071529.

It can be divided in two parts, 972 and 8147, that added together give a palindrome (9119).

The spelling of 9728147 in words is "nine million, seven hundred twenty-eight thousand, one hundred forty-seven".