9840538 has 4 divisors (see below), whose sum is σ = 14760810. Its totient is φ = 4920268.

The previous prime is 9840521. The next prime is 9840539. The reversal of 9840538 is 8350489.

9840538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8350489 = 7 ⋅1192927.

It can be written as a sum of positive squares in only one way, i.e., 9690769 + 149769 = 3113^2 + 387^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9840497 and 9840506.

It is not an unprimeable number, because it can be changed into a prime (9840539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2460133 + ... + 2460136.

Almost surely, 2^9840538 is an apocalyptic number.

9840538 is a deficient number, since it is larger than the sum of its proper divisors (4920272).

9840538 is a wasteful number, since it uses less digits than its factorization.

9840538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4920271.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 9840538 is about 3136.9631811674. The cubic root of 9840538 is about 214.2921592559.

The spelling of 9840538 in words is "nine million, eight hundred forty thousand, five hundred thirty-eight".