9985880 has 16 divisors (see below), whose sum is σ = 22468320. Its totient is φ = 3994336.

The previous prime is 9985879. The next prime is 9985891. The reversal of 9985880 is 885899.

It is a happy number.

9985880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124784 + ... + 124863.

It is an arithmetic number, because the mean of its divisors is an integer number (1404270).

Almost surely, 2^9985880 is an apocalyptic number.

It is an amenable number.

9985880 is an abundant number, since it is smaller than the sum of its proper divisors (12482440).

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

9985880 is a wasteful number, since it uses less digits than its factorization.

9985880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249658 (or 249654 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 47.

The square root of 9985880 is about 3160.0443034869. The cubic root of 9985880 is about 215.3420191797.

The spelling of 9985880 in words is "nine million, nine hundred eighty-five thousand, eight hundred eighty".