9986990 has 32 divisors (see below), whose sum is σ = 20502720. Its totient is φ = 3469824.

The previous prime is 9986987. The next prime is 9986993. The reversal of 9986990 is 996899.

9986990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9986987) and next prime (9986993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50 + ... + 4469.

It is an arithmetic number, because the mean of its divisors is an integer number (640710).

Almost surely, 2^9986990 is an apocalyptic number.

9986990 is an abundant number, since it is smaller than the sum of its proper divisors (10515730).

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

9986990 is a wasteful number, since it uses less digits than its factorization.

9986990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 9986990 is about 3160.2199290556. The cubic root of 9986990 is about 215.3499978051.

The spelling of 9986990 in words is "nine million, nine hundred eighty-six thousand, nine hundred ninety".