228281888 has 12 divisors (see below), whose sum is σ = 449430030. Its totient is φ = 114140928.

The previous prime is 228281849. The next prime is 228281909. The reversal of 228281888 is 888182822.

It can be written as a sum of positive squares in only one way, i.e., 169728784 + 58553104 = 13028^2 + 7652^2 .

It is a super-2 number, since 2×228281888² = 104225240777689088, which contains 22 as substring.

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

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, 3566873 + ... + 3566936.

Almost surely, 2^228281888 is an apocalyptic number.

It is an amenable number.

228281888 is a deficient number, since it is larger than the sum of its proper divisors (221148142).

228281888 is an equidigital number, since it uses as much as digits as its factorization.

228281888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7133819 (or 7133811 counting only the distinct ones).

The product of its digits is 262144, while the sum is 47.

The square root of 228281888 is about 15109.0002316500. Note that the first 3 decimals coincide. The cubic root of 228281888 is about 611.1631377218.

The spelling of 228281888 in words is "two hundred twenty-eight million, two hundred eighty-one thousand, eight hundred eighty-eight".