228138184 has 8 divisors (see below), whose sum is σ = 427759110. Its totient is φ = 114069088.

The previous prime is 228138161. The next prime is 228138193. The reversal of 228138184 is 481831822.

It can be written as a sum of positive squares in only one way, i.e., 227346084 + 792100 = 15078^2 + 890^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14258629 + ... + 14258644.

Almost surely, 2^228138184 is an apocalyptic number.

It is an amenable number.

228138184 is a deficient number, since it is larger than the sum of its proper divisors (199620926).

228138184 is a wasteful number, since it uses less digits than its factorization.

228138184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28517279 (or 28517275 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 228138184 is about 15104.2439069289. The cubic root of 228138184 is about 611.0348679121.

The spelling of 228138184 in words is "two hundred twenty-eight million, one hundred thirty-eight thousand, one hundred eighty-four".