228940 has 12 divisors (see below), whose sum is σ = 480816. Its totient is φ = 91568.

The previous prime is 228929. The next prime is 228953. The reversal of 228940 is 49822.

228940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

228940 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5704 + ... + 5743.

It is an arithmetic number, because the mean of its divisors is an integer number (40068).

2²²⁸⁹⁴⁰ is an apocalyptic number.

228940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228940 is an abundant number, since it is smaller than the sum of its proper divisors (251876).

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

228940 is a wasteful number, since it uses less digits than its factorization.

228940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11456 (or 11454 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 228940 is about 478.4767496964. The cubic root of 228940 is about 61.1749879992.

The spelling of 228940 in words is "two hundred twenty-eight thousand, nine hundred forty".