9726538 has 4 divisors (see below), whose sum is σ = 14589810. Its totient is φ = 4863268.

The previous prime is 9726517. The next prime is 9726547. The reversal of 9726538 is 8356279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8356279 = 409 ⋅20431.

It can be written as a sum of positive squares in only one way, i.e., 9381969 + 344569 = 3063^2 + 587^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 9726538.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2431633 + ... + 2431636.

Almost surely, 2^9726538 is an apocalyptic number.

9726538 is a deficient number, since it is larger than the sum of its proper divisors (4863272).

9726538 is a wasteful number, since it uses less digits than its factorization.

9726538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863271.

The product of its digits is 90720, while the sum is 40.

The square root of 9726538 is about 3118.7398096026. The cubic root of 9726538 is about 213.4614372742.

The spelling of 9726538 in words is "nine million, seven hundred twenty-six thousand, five hundred thirty-eight".