228128844 has 24 divisors (see below), whose sum is σ = 532567728. Its totient is φ = 76004800.

The previous prime is 228128843. The next prime is 228128851. The reversal of 228128844 is 448821822.

228128844 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (228128843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30694 + ... + 37394.

It is an arithmetic number, because the mean of its divisors is an integer number (22190322).

Almost surely, 2^228128844 is an apocalyptic number.

It is an amenable number.

228128844 is an abundant number, since it is smaller than the sum of its proper divisors (304438884).

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

228128844 is a wasteful number, since it uses less digits than its factorization.

228128844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9545 (or 9543 counting only the distinct ones).

The product of its digits is 65536, while the sum is 39.

The square root of 228128844 is about 15103.9347191386. The cubic root of 228128844 is about 611.0265291888.

It can be divided in two parts, 2281 and 28844, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 228128844 in words is "two hundred twenty-eight million, one hundred twenty-eight thousand, eight hundred forty-four".