228438216 has 48 divisors (see below), whose sum is σ = 651253200. Its totient is φ = 72137952.

The previous prime is 228438211. The next prime is 228438227. The reversal of 228438216 is 612834822.

228438216 is a `hidden beast` number, since 2 + 2 + 8 + 438 + 216 = 666.

228438216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (228438211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82126 + ... + 84861.

It is an arithmetic number, because the mean of its divisors is an integer number (13567775).

Almost surely, 2^228438216 is an apocalyptic number.

It is an amenable number.

228438216 is an abundant number, since it is smaller than the sum of its proper divisors (422814984).

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

228438216 is a wasteful number, since it uses less digits than its factorization.

228438216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167018 (or 167011 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 228438216 is about 15114.1726865879. The cubic root of 228438216 is about 611.3026145634.

The spelling of 228438216 in words is "two hundred twenty-eight million, four hundred thirty-eight thousand, two hundred sixteen".