228805 has 8 divisors (see below), whose sum is σ = 279072. Its totient is φ = 180048.

The previous prime is 228799. The next prime is 228829. The reversal of 228805 is 508822.

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 228805 - 2³ = 228797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7 + ... + 676.

It is an arithmetic number, because the mean of its divisors is an integer number (34884).

2²²⁸⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

228805 is a deficient number, since it is larger than the sum of its proper divisors (50267).

228805 is an equidigital number, since it uses as much as digits as its factorization.

228805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 228805 is about 478.3356562081. The cubic root of 228805 is about 61.1629611986.

The spelling of 228805 in words is "two hundred twenty-eight thousand, eight hundred five".