228144905 has 8 divisors (see below), whose sum is σ = 274006152. Its totient is φ = 182361088.

The previous prime is 228144899. The next prime is 228144949. The reversal of 228144905 is 509441822.

228144905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2274064 + 225870841 = 1508^2 + 15029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228144905 - 2¹⁴ = 228128521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12662 + ... + 24831.

It is an arithmetic number, because the mean of its divisors is an integer number (34250769).

Almost surely, 2^228144905 is an apocalyptic number.

It is an amenable number.

228144905 is a deficient number, since it is larger than the sum of its proper divisors (45861247).

228144905 is a wasteful number, since it uses less digits than its factorization.

228144905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38715.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 228144905 is about 15104.4663924284. The cubic root of 228144905 is about 611.0408682594.

The spelling of 228144905 in words is "two hundred twenty-eight million, one hundred forty-four thousand, nine hundred five".