438228 has 72 divisors (see below), whose sum is σ = 1327872. Its totient is φ = 119232.

The previous prime is 438223. The next prime is 438233. The reversal of 438228 is 822834.

438228 is a `hidden beast` number, since 438 + 228 = 666.

It is an interprime number because it is at equal distance from previous prime (438223) and next prime (438233).

Its product of digits (3072) is a multiple of the sum of its prime divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9301 + ... + 9347.

2⁴³⁸²²⁸ 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 438228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (663936).

438228 is an abundant number, since it is smaller than the sum of its proper divisors (889644).

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

438228 is a wasteful number, since it uses less digits than its factorization.

438228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 96 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 438228 is about 661.9879152976. The cubic root of 438228 is about 75.9568083300.

It can be divided in two parts, 438 and 228, that added together give a palindrome (666).

The spelling of 438228 in words is "four hundred thirty-eight thousand, two hundred twenty-eight".