228271628 has 12 divisors (see below), whose sum is σ = 430204320. Its totient is φ = 105356112.

The previous prime is 228271609. The next prime is 228271633. The reversal of 228271628 is 826172822.

It is a happy number.

It is a super-2 number, since 2×228271628² = 104215872299540768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228271591 and 228271600.

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 in 3 ways as a sum of consecutive naturals, for example, 2194868 + ... + 2194971.

It is an arithmetic number, because the mean of its divisors is an integer number (35850360).

Almost surely, 2^228271628 is an apocalyptic number.

It is an amenable number.

228271628 is a deficient number, since it is larger than the sum of its proper divisors (201932692).

228271628 is a wasteful number, since it uses less digits than its factorization.

228271628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4389856 (or 4389854 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 228271628 is about 15108.6606951113. The cubic root of 228271628 is about 611.1539814578.

The spelling of 228271628 in words is "two hundred twenty-eight million, two hundred seventy-one thousand, six hundred twenty-eight".