222928128 has 54 divisors (see below), whose sum is σ = 642763394. Its totient is φ = 74308608.

The previous prime is 222928117. The next prime is 222928129. The reversal of 222928128 is 821829222.

It is a happy number.

222928128 is digitally balanced in base 3, 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 only one way, i.e., 222845184 + 82944 = 14928^2 + 288^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 222928092 and 222928101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222928129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46075 + ... + 50682.

Almost surely, 2^222928128 is an apocalyptic number.

It is an amenable number.

222928128 is an abundant number, since it is smaller than the sum of its proper divisors (419835266).

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

222928128 is an equidigital number, since it uses as much as digits as its factorization.

222928128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96779 (or 96762 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 222928128 is about 14930.7778765877. Note that the first 3 decimals coincide. The cubic root of 222928128 is about 606.3475443286.

The spelling of 222928128 in words is "two hundred twenty-two million, nine hundred twenty-eight thousand, one hundred twenty-eight".