228121672 has 8 divisors (see below), whose sum is σ = 427728150. Its totient is φ = 114060832.

The previous prime is 228121637. The next prime is 228121693. The reversal of 228121672 is 276121822.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 215913636 + 12208036 = 14694^2 + 3494^2 .

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

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, 14257597 + ... + 14257612.

Almost surely, 2^228121672 is an apocalyptic number.

It is an amenable number.

228121672 is a deficient number, since it is larger than the sum of its proper divisors (199606478).

228121672 is a wasteful number, since it uses less digits than its factorization.

228121672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28515215 (or 28515211 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 228121672 is about 15103.6972956955. The cubic root of 228121672 is about 611.0201258948.

The spelling of 228121672 in words is "two hundred twenty-eight million, one hundred twenty-one thousand, six hundred seventy-two".