228442 has 4 divisors (see below), whose sum is σ = 342666. Its totient is φ = 114220.

The previous prime is 228427. The next prime is 228443. The reversal of 228442 is 244822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 192721 + 35721 = 439^2 + 189^2 .

It is not an unprimeable number, because it can be changed into a prime (228443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57109 + ... + 57112.

2²²⁸⁴⁴² is an apocalyptic number.

228442 is a deficient number, since it is larger than the sum of its proper divisors (114224).

228442 is a wasteful number, since it uses less digits than its factorization.

228442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114223.

The product of its digits is 1024, while the sum is 22.

The square root of 228442 is about 477.9560649265. The cubic root of 228442 is about 61.1305989884.

It can be divided in two parts, 22 and 8442, that added together give a square (8464 = 92²).

The spelling of 228442 in words is "two hundred twenty-eight thousand, four hundred forty-two".