9844979994 has 24 divisors (see below), whose sum is σ = 21361246452. Its totient is φ = 3276974400.

The previous prime is 9844979951. The next prime is 9844979999. The reversal of 9844979994 is 4999794489.

It is a happy number.

9844979994 is a `hidden beast` number, since 9 + 8 + 449 + 7 + 99 + 94 = 666.

9844979994 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 9577166769 + 267813225 = 97863^2 + 16365^2 .

It is not an unprimeable number, because it can be changed into a prime (9844979999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 377499 + ... + 402734.

Almost surely, 2^9844979994 is an apocalyptic number.

9844979994 is an abundant number, since it is smaller than the sum of its proper divisors (11516266458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9844979994 is a wasteful number, since it uses less digits than its factorization.

9844979994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780942 (or 780939 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 72.

The square root of 9844979994 is about 99221.8725584233. The cubic root of 9844979994 is about 2143.2439805203.

The spelling of 9844979994 in words is "nine billion, eight hundred forty-four million, nine hundred seventy-nine thousand, nine hundred ninety-four".