228566 has 16 divisors (see below), whose sum is σ = 378000. Its totient is φ = 103008.

The previous prime is 228559. The next prime is 228577. The reversal of 228566 is 665822.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

228566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1460 + ... + 1608.

It is an arithmetic number, because the mean of its divisors is an integer number (23625).

2²²⁸⁵⁶⁶ is an apocalyptic number.

228566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

228566 is a deficient number, since it is larger than the sum of its proper divisors (149434).

228566 is a wasteful number, since it uses less digits than its factorization.

228566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223.

The product of its digits is 5760, while the sum is 29.

The square root of 228566 is about 478.0857663642. The cubic root of 228566 is about 61.1416577008.

The spelling of 228566 in words is "two hundred twenty-eight thousand, five hundred sixty-six".