9117220 has 24 divisors (see below), whose sum is σ = 21881664. Its totient is φ = 3125856.

The previous prime is 9117209. The next prime is 9117221. The reversal of 9117220 is 227119.

It is a junction number, because it is equal to n+sod(n) for n = 9117191 and 9117200.

It is not an unprimeable number, because it can be changed into a prime (9117221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32422 + ... + 32701.

It is an arithmetic number, because the mean of its divisors is an integer number (911736).

Almost surely, 2^9117220 is an apocalyptic number.

It is an amenable number.

9117220 is an abundant number, since it is smaller than the sum of its proper divisors (12764444).

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

9117220 is a wasteful number, since it uses less digits than its factorization.

9117220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65139 (or 65137 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 9117220 is about 3019.4734640331. The cubic root of 9117220 is about 208.9075543319.

The spelling of 9117220 in words is "nine million, one hundred seventeen thousand, two hundred twenty".