228143638 has 32 divisors (see below), whose sum is σ = 383628960. Its totient is φ = 101230080.

The previous prime is 228143611. The next prime is 228143651. The reversal of 228143638 is 836341822.

It is a junction number, because it is equal to n+sod(n) for n = 228143597 and 228143606.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 39708 + ... + 45088.

It is an arithmetic number, because the mean of its divisors is an integer number (11988405).

Almost surely, 2^228143638 is an apocalyptic number.

228143638 is a deficient number, since it is larger than the sum of its proper divisors (155485322).

228143638 is a wasteful number, since it uses less digits than its factorization.

228143638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5472.

The product of its digits is 55296, while the sum is 37.

The square root of 228143638 is about 15104.4244511335. The cubic root of 228143638 is about 611.0397371213.

The spelling of 228143638 in words is "two hundred twenty-eight million, one hundred forty-three thousand, six hundred thirty-eight".