9618220 has 12 divisors (see below), whose sum is σ = 20198304. Its totient is φ = 3847280.

The previous prime is 9618137. The next prime is 9618233. The reversal of 9618220 is 228169.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240436 + ... + 240475.

It is an arithmetic number, because the mean of its divisors is an integer number (1683192).

Almost surely, 2^9618220 is an apocalyptic number.

It is an amenable number.

9618220 is an abundant number, since it is smaller than the sum of its proper divisors (10580084).

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

9618220 is a wasteful number, since it uses less digits than its factorization.

9618220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480920 (or 480918 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 9618220 is about 3101.3255230627. The cubic root of 9618220 is about 212.6660846914. Note that the first 3 decimals are identical.

The spelling of 9618220 in words is "nine million, six hundred eighteen thousand, two hundred twenty".