9840434 has 4 divisors (see below), whose sum is σ = 14760654. Its totient is φ = 4920216.

The previous prime is 9840431. The next prime is 9840443. The reversal of 9840434 is 4340489.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4340489 = 109 ⋅39821.

It can be written as a sum of positive squares in only one way, i.e., 8684809 + 1155625 = 2947^2 + 1075^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9840434.

It is not an unprimeable number, because it can be changed into a prime (9840431) 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, 2460107 + ... + 2460110.

Almost surely, 2^9840434 is an apocalyptic number.

9840434 is a deficient number, since it is larger than the sum of its proper divisors (4920220).

9840434 is a wasteful number, since it uses less digits than its factorization.

9840434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4920219.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 9840434 is about 3136.9466045822. The cubic root of 9840434 is about 214.2914043357.

Subtracting from 9840434 its reverse (4340489), we obtain a palindrome (5499945).

The spelling of 9840434 in words is "nine million, eight hundred forty thousand, four hundred thirty-four".