9090220 has 24 divisors (see below), whose sum is σ = 19405008. Its totient is φ = 3576000.

The previous prime is 9090217. The next prime is 9090229. The reversal of 9090220 is 220909.

It is a junction number, because it is equal to n+sod(n) for n = 9090191 and 9090200.

It is not an unprimeable number, because it can be changed into a prime (9090229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2506 + ... + 4945.

It is an arithmetic number, because the mean of its divisors is an integer number (808542).

Almost surely, 2^9090220 is an apocalyptic number.

It is an amenable number.

9090220 is an abundant number, since it is smaller than the sum of its proper divisors (10314788).

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

9090220 is a wasteful number, since it uses less digits than its factorization.

9090220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7521 (or 7519 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 9090220 is about 3014.9991708125. Note that the first 3 decimals coincide. The cubic root of 9090220 is about 208.7011287940.

The spelling of 9090220 in words is "nine million, ninety thousand, two hundred twenty".