9987900 has 108 divisors (see below), whose sum is σ = 31451112. Its totient is φ = 2446080.

The previous prime is 9987893. The next prime is 9987931. The reversal of 9987900 is 97899.

It is a happy number.

9987900 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 50602 + ... + 50798.

It is an arithmetic number, because the mean of its divisors is an integer number (291214).

Almost surely, 2^9987900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9987900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15725556).

9987900 is an abundant number, since it is smaller than the sum of its proper divisors (21463212).

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

9987900 is a wasteful number, since it uses less digits than its factorization.

9987900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 9987900 is about 3160.3639030972. The cubic root of 9987900 is about 215.3565383992.

The spelling of 9987900 in words is "nine million, nine hundred eighty-seven thousand, nine hundred".