9728751 has 8 divisors (see below), whose sum is σ = 12988800. Its totient is φ = 6477272.

The previous prime is 9728737. The next prime is 9728753. The reversal of 9728751 is 1578279.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9728751 - 2²¹ = 7631599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9728753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300 + ... + 4598.

It is an arithmetic number, because the mean of its divisors is an integer number (1623600).

Almost surely, 2^9728751 is an apocalyptic number.

9728751 is a deficient number, since it is larger than the sum of its proper divisors (3260049).

9728751 is a wasteful number, since it uses less digits than its factorization.

9728751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4285.

The product of its digits is 35280, while the sum is 39.

The square root of 9728751 is about 3119.0945801626. The cubic root of 9728751 is about 213.4776250942.

The spelling of 9728751 in words is "nine million, seven hundred twenty-eight thousand, seven hundred fifty-one".