9939856 has 10 divisors (see below), whose sum is σ = 19258502. Its totient is φ = 4969920.

The previous prime is 9939833. The next prime is 9939857. The reversal of 9939856 is 6589399.

9939856 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 only one way, i.e., 9709456 + 230400 = 3116^2 + 480^2 .

It is not an unprimeable number, because it can be changed into a prime (9939857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310605 + ... + 310636.

Almost surely, 2^9939856 is an apocalyptic number.

It is an amenable number.

9939856 is a deficient number, since it is larger than the sum of its proper divisors (9318646).

9939856 is a wasteful number, since it uses less digits than its factorization.

9939856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621249 (or 621243 counting only the distinct ones).

The product of its digits is 524880, while the sum is 49.

The square root of 9939856 is about 3152.7537169909. The cubic root of 9939856 is about 215.0106791162.

The spelling of 9939856 in words is "nine million, nine hundred thirty-nine thousand, eight hundred fifty-six".