9910890 has 128 divisors (see below), whose sum is σ = 29859840. Its totient is φ = 2318400.

The previous prime is 9910883. The next prime is 9910909. The reversal of 9910890 is 980199.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 139555 + ... + 139625.

It is an arithmetic number, because the mean of its divisors is an integer number (233280).

Almost surely, 2^9910890 is an apocalyptic number.

9910890 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9910890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14929920).

9910890 is an abundant number, since it is smaller than the sum of its proper divisors (19948950).

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

9910890 is a wasteful number, since it uses less digits than its factorization.

9910890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 9910890 is about 3148.1566034745. The cubic root of 9910890 is about 214.8016197874.

The spelling of 9910890 in words is "nine million, nine hundred ten thousand, eight hundred ninety".