228156 has 12 divisors (see below), whose sum is σ = 532392. Its totient is φ = 76048.

The previous prime is 228139. The next prime is 228181. The reversal of 228156 is 651822.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 228156.

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, 9495 + ... + 9518.

It is an arithmetic number, because the mean of its divisors is an integer number (44366).

2²²⁸¹⁵⁶ is an apocalyptic number.

It is an amenable number.

228156 is an abundant number, since it is smaller than the sum of its proper divisors (304236).

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

228156 is a wasteful number, since it uses less digits than its factorization.

228156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19020 (or 19018 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 228156 is about 477.6567805444. The cubic root of 228156 is about 61.1050773351.

Adding to 228156 its reverse (651822), we get a palindrome (879978).

The spelling of 228156 in words is "two hundred twenty-eight thousand, one hundred fifty-six".