228658 has 4 divisors (see below), whose sum is σ = 342990. Its totient is φ = 114328.

The previous prime is 228647. The next prime is 228677. The reversal of 228658 is 856822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 856822 = 2 ⋅428411.

It can be written as a sum of positive squares in only one way, i.e., 178929 + 49729 = 423^2 + 223^2 .

It is an unprimeable number.

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, 57163 + ... + 57166.

2²²⁸⁶⁵⁸ is an apocalyptic number.

228658 is a deficient number, since it is larger than the sum of its proper divisors (114332).

228658 is a wasteful number, since it uses less digits than its factorization.

228658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114331.

The product of its digits is 7680, while the sum is 31.

The square root of 228658 is about 478.1819737297. The cubic root of 228658 is about 61.1498599676.

The spelling of 228658 in words is "two hundred twenty-eight thousand, six hundred fifty-eight".