228655872 has 90 divisors (see below), whose sum is σ = 681872268. Its totient is φ = 76211712.

The previous prime is 228655849. The next prime is 228655873. The reversal of 228655872 is 278556822.

228655872 is a `hidden beast` number, since 2 + 2 + 8 + 65 + 587 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (228655873) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15223 + ... + 26249.

Almost surely, 2^228655872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228655872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340936134).

228655872 is an abundant number, since it is smaller than the sum of its proper divisors (453216396).

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

228655872 is an equidigital number, since it uses as much as digits as its factorization.

228655872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11055 (or 11032 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 228655872 is about 15121.3713663808. The cubic root of 228655872 is about 611.4967027049.

It can be divided in two parts, 228 and 655872, that added together give a square (656100 = 810²).

The spelling of 228655872 in words is "two hundred twenty-eight million, six hundred fifty-five thousand, eight hundred seventy-two".