9909220 has 12 divisors (see below), whose sum is σ = 20809404. Its totient is φ = 3963680.

The previous prime is 9909217. The next prime is 9909247. The reversal of 9909220 is 229099.

It can be written as a sum of positive squares in 2 ways, for example, as 2214144 + 7695076 = 1488^2 + 2774^2 .

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 3 ways as a sum of consecutive naturals, for example, 247711 + ... + 247750.

It is an arithmetic number, because the mean of its divisors is an integer number (1734117).

Almost surely, 2^9909220 is an apocalyptic number.

It is an amenable number.

9909220 is an abundant number, since it is smaller than the sum of its proper divisors (10900184).

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

9909220 is a wasteful number, since it uses less digits than its factorization.

9909220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495470 (or 495468 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 9909220 is about 3147.8913577187. The cubic root of 9909220 is about 214.7895543101.

The spelling of 9909220 in words is "nine million, nine hundred nine thousand, two hundred twenty".