228144778 has 4 divisors (see below), whose sum is σ = 342217170. Its totient is φ = 114072388.

The previous prime is 228144767. The next prime is 228144781. The reversal of 228144778 is 877441822.

228144778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 193015449 + 35129329 = 13893^2 + 5927^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57036193 + ... + 57036196.

Almost surely, 2^228144778 is an apocalyptic number.

228144778 is a deficient number, since it is larger than the sum of its proper divisors (114072392).

228144778 is a wasteful number, since it uses less digits than its factorization.

228144778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114072391.

The product of its digits is 200704, while the sum is 43.

The square root of 228144778 is about 15104.4621883733. The cubic root of 228144778 is about 611.0407548780.

The spelling of 228144778 in words is "two hundred twenty-eight million, one hundred forty-four thousand, seven hundred seventy-eight".