9728618 has 4 divisors (see below), whose sum is σ = 14592930. Its totient is φ = 4864308.

The previous prime is 9728617. The next prime is 9728639. The reversal of 9728618 is 8168279.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9504889 + 223729 = 3083^2 + 473^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9728611) 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 as a sum of consecutive naturals, namely, 2432153 + ... + 2432156.

Almost surely, 2^9728618 is an apocalyptic number.

9728618 is a deficient number, since it is larger than the sum of its proper divisors (4864312).

9728618 is a wasteful number, since it uses less digits than its factorization.

9728618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4864311.

The product of its digits is 48384, while the sum is 41.

The square root of 9728618 is about 3119.0732598001. The cubic root of 9728618 is about 213.4766522851.

The spelling of 9728618 in words is "nine million, seven hundred twenty-eight thousand, six hundred eighteen".