228693 has 4 divisors (see below), whose sum is σ = 304928. Its totient is φ = 152460.

The previous prime is 228677. The next prime is 228707. The reversal of 228693 is 396822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 228693 - 2⁴ = 228677 is a prime.

It is a D-number.

It is a Duffinian number.

228693 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 228693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38113 + ... + 38118.

It is an arithmetic number, because the mean of its divisors is an integer number (76232).

2²²⁸⁶⁹³ is an apocalyptic number.

It is an amenable number.

228693 is a deficient number, since it is larger than the sum of its proper divisors (76235).

228693 is an equidigital number, since it uses as much as digits as its factorization.

228693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76234.

The product of its digits is 5184, while the sum is 30.

The square root of 228693 is about 478.2185692756. The cubic root of 228693 is about 61.1529798175.

The spelling of 228693 in words is "two hundred twenty-eight thousand, six hundred ninety-three".