9908820 has 36 divisors (see below), whose sum is σ = 30057300. Its totient is φ = 2642304.

The previous prime is 9908819. The next prime is 9908851. The reversal of 9908820 is 288099.

It can be written as a sum of positive squares in 2 ways, for example, as 6625476 + 3283344 = 2574^2 + 1812^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 27345 + ... + 27704.

It is an arithmetic number, because the mean of its divisors is an integer number (834925).

Almost surely, 2^9908820 is an apocalyptic number.

9908820 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9908820 is an abundant number, since it is smaller than the sum of its proper divisors (20148480).

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

9908820 is a wasteful number, since it uses less digits than its factorization.

9908820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55064 (or 55059 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 9908820 is about 3147.8278224833. The cubic root of 9908820 is about 214.7866641742.

The spelling of 9908820 in words is "nine million, nine hundred eight thousand, eight hundred twenty".