228786 has 16 divisors (see below), whose sum is σ = 484704. Its totient is φ = 71744.

The previous prime is 228773. The next prime is 228793. The reversal of 228786 is 687822.

It is an unprimeable number.

228786 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, 1020 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (30294).

2²²⁸⁷⁸⁶ is an apocalyptic number.

228786 is an abundant number, since it is smaller than the sum of its proper divisors (255918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228786 is a wasteful number, since it uses less digits than its factorization.

228786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265.

The product of its digits is 10752, while the sum is 33.

The square root of 228786 is about 478.3157952650. The cubic root of 228786 is about 61.1612681580.

The spelling of 228786 in words is "two hundred twenty-eight thousand, seven hundred eighty-six".