228766 has 8 divisors (see below), whose sum is σ = 346680. Its totient is φ = 113208.

The previous prime is 228757. The next prime is 228773. The reversal of 228766 is 667822.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321 + ... + 748.

It is an arithmetic number, because the mean of its divisors is an integer number (43335).

2²²⁸⁷⁶⁶ is an apocalyptic number.

228766 is the 303-rd centered pentagonal number.

228766 is a deficient number, since it is larger than the sum of its proper divisors (117914).

228766 is a wasteful number, since it uses less digits than its factorization.

228766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178.

The product of its digits is 8064, while the sum is 31.

The square root of 228766 is about 478.2948881182. The cubic root of 228766 is about 61.1594859088.

The spelling of 228766 in words is "two hundred twenty-eight thousand, seven hundred sixty-six".