228365 has 4 divisors (see below), whose sum is σ = 274044. Its totient is φ = 182688.

The previous prime is 228359. The next prime is 228383. The reversal of 228365 is 563822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157609 + 70756 = 397^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 228365 - 2⁶ = 228301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22832 + ... + 22841.

It is an arithmetic number, because the mean of its divisors is an integer number (68511).

2²²⁸³⁶⁵ is an apocalyptic number.

It is an amenable number.

228365 is a deficient number, since it is larger than the sum of its proper divisors (45679).

228365 is an equidigital number, since it uses as much as digits as its factorization.

228365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45678.

The product of its digits is 2880, while the sum is 26.

The square root of 228365 is about 477.8755068007. The cubic root of 228365 is about 61.1237298705.

The spelling of 228365 in words is "two hundred twenty-eight thousand, three hundred sixty-five".