228506 has 8 divisors (see below), whose sum is σ = 348564. Its totient is φ = 112320.

The previous prime is 228479. The next prime is 228509. The reversal of 228506 is 605822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 152881 + 75625 = 391^2 + 275^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228509) 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 in 3 ways as a sum of consecutive naturals, for example, 815 + ... + 1058.

2²²⁸⁵⁰⁶ is an apocalyptic number.

228506 is a deficient number, since it is larger than the sum of its proper divisors (120058).

228506 is a wasteful number, since it uses less digits than its factorization.

228506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936.

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

The square root of 228506 is about 478.0230119984. The cubic root of 228506 is about 61.1363072105.

The spelling of 228506 in words is "two hundred twenty-eight thousand, five hundred six".