9879980 has 24 divisors (see below), whose sum is σ = 22634640. Its totient is φ = 3592640.

The previous prime is 9879959. The next prime is 9879983. The reversal of 9879980 is 899789.

It is a super-2 number, since 2×9879980² = 195228009600800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9879983) 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 7 ways as a sum of consecutive naturals, for example, 22235 + ... + 22674.

It is an arithmetic number, because the mean of its divisors is an integer number (943110).

Almost surely, 2^9879980 is an apocalyptic number.

It is an amenable number.

9879980 is an abundant number, since it is smaller than the sum of its proper divisors (12754660).

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

9879980 is a wasteful number, since it uses less digits than its factorization.

9879980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44929 (or 44927 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 9879980 is about 3143.2435476749. The cubic root of 9879980 is about 214.5780800758.

The spelling of 9879980 in words is "nine million, eight hundred seventy-nine thousand, nine hundred eighty".