228861 has 12 divisors (see below), whose sum is σ = 336960. Its totient is φ = 149640.

The previous prime is 228859. The next prime is 228869. The reversal of 228861 is 168822.

It is not a de Polignac number, because 228861 - 2¹ = 228859 is a prime.

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 228861.

It is not an unprimeable number, because it can be changed into a prime (228869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316 + ... + 746.

It is an arithmetic number, because the mean of its divisors is an integer number (28080).

2²²⁸⁸⁶¹ is an apocalyptic number.

It is an amenable number.

228861 is a deficient number, since it is larger than the sum of its proper divisors (108099).

228861 is a wasteful number, since it uses less digits than its factorization.

228861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 493 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 228861 is about 478.3941889279. The cubic root of 228861 is about 61.1679506677.

It can be divided in two parts, 228 and 861, that added together give a square (1089 = 33²).

The spelling of 228861 in words is "two hundred twenty-eight thousand, eight hundred sixty-one".