9090224 has 80 divisors (see below), whose sum is σ = 21561120. Its totient is φ = 3655680.

The previous prime is 9090217. The next prime is 9090229. The reversal of 9090224 is 4220909.

It is a Cunningham number, because it is equal to 3015²-1.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 9090193 and 9090202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090229) 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, 66284 + ... + 66420.

It is an arithmetic number, because the mean of its divisors is an integer number (269514).

Almost surely, 2^9090224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9090224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10780560).

9090224 is an abundant number, since it is smaller than the sum of its proper divisors (12470896).

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

9090224 is a wasteful number, since it uses less digits than its factorization.

9090224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 9090224 is about 3014.9998341625. Note that the first 3 decimals coincide. The cubic root of 9090224 is about 208.7011594058.

The spelling of 9090224 in words is "nine million, ninety thousand, two hundred twenty-four".