228605 has 8 divisors (see below), whose sum is σ = 295512. Its totient is φ = 168768.

The previous prime is 228601. The next prime is 228611. The reversal of 228605 is 506822.

228605 = T₁₈₁ + T₁₈₂ + ... + T₁₉₃.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37636 + 190969 = 194^2 + 437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228605 - 2² = 228601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1694 + ... + 1823.

It is an arithmetic number, because the mean of its divisors is an integer number (36939).

2²²⁸⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

228605 is a deficient number, since it is larger than the sum of its proper divisors (66907).

228605 is a wasteful number, since it uses less digits than its factorization.

228605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 228605 is about 478.1265522851. The cubic root of 228605 is about 61.1451350174.

The spelling of 228605 in words is "two hundred twenty-eight thousand, six hundred five".