9979850 has 48 divisors (see below), whose sum is σ = 20088000. Its totient is φ = 3674880.

The previous prime is 9979843. The next prime is 9979859. The reversal of 9979850 is 589799.

9979850 is nontrivially palindromic in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 9979795 and 9979804.

It is not an unprimeable number, because it can be changed into a prime (9979859) 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 in 23 ways as a sum of consecutive naturals, for example, 50051 + ... + 50249.

It is an arithmetic number, because the mean of its divisors is an integer number (418500).

Almost surely, 2^9979850 is an apocalyptic number.

9979850 is an abundant number, since it is smaller than the sum of its proper divisors (10108150).

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

9979850 is a wasteful number, since it uses less digits than its factorization.

9979850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 9979850 is about 3159.0900588619. The cubic root of 9979850 is about 215.2986655032.

The spelling of 9979850 in words is "nine million, nine hundred seventy-nine thousand, eight hundred fifty".