228216366 has 112 divisors (see below), whose sum is σ = 598089600. Its totient is φ = 63930384.

The previous prime is 228216337. The next prime is 228216367. The reversal of 228216366 is 663612822.

228216366 is a `hidden beast` number, since 2 + 282 + 16 + 366 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 228216366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228216367) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 601965 + ... + 602343.

Almost surely, 2^228216366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228216366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299044800).

228216366 is an abundant number, since it is smaller than the sum of its proper divisors (369873234).

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

228216366 is an equidigital number, since it uses as much as digits as its factorization.

228216366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 450 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 228216366 is about 15106.8317657939. The cubic root of 228216366 is about 611.1046596368.

The spelling of 228216366 in words is "two hundred twenty-eight million, two hundred sixteen thousand, three hundred sixty-six".