228458 has 4 divisors (see below), whose sum is σ = 342690. Its totient is φ = 114228.

The previous prime is 228457. The next prime is 228461. The reversal of 228458 is 854822.

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., 162409 + 66049 = 403^2 + 257^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 228458.

It is not an unprimeable number, because it can be changed into a prime (228451) 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, 57113 + ... + 57116.

2²²⁸⁴⁵⁸ is an apocalyptic number.

228458 is a deficient number, since it is larger than the sum of its proper divisors (114232).

228458 is a wasteful number, since it uses less digits than its factorization.

228458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114231.

The product of its digits is 5120, while the sum is 29.

The square root of 228458 is about 477.9728025735. The cubic root of 228458 is about 61.1320261438.

It can be divided in two parts, 228 and 458, that added together give a palindrome (686).

The spelling of 228458 in words is "two hundred twenty-eight thousand, four hundred fifty-eight".