9906538 has 8 divisors (see below), whose sum is σ = 15063588. Its totient is φ = 4885344.

The previous prime is 9906527. The next prime is 9906569. The reversal of 9906538 is 8356099.

9906538 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 2 ways, for example, as 9566649 + 339889 = 3093^2 + 583^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 9906538.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33781 + ... + 34072.

Almost surely, 2^9906538 is an apocalyptic number.

9906538 is a deficient number, since it is larger than the sum of its proper divisors (5157050).

9906538 is a wasteful number, since it uses less digits than its factorization.

9906538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67928.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 9906538 is about 3147.4653294357. The cubic root of 9906538 is about 214.7701744610.

The spelling of 9906538 in words is "nine million, nine hundred six thousand, five hundred thirty-eight".