228355438 has 4 divisors (see below), whose sum is σ = 342533160. Its totient is φ = 114177718.

The previous prime is 228355397. The next prime is 228355481. The reversal of 228355438 is 834553822.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 228355438.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57088858 + ... + 57088861.

It is an arithmetic number, because the mean of its divisors is an integer number (85633290).

Almost surely, 2^228355438 is an apocalyptic number.

228355438 is a deficient number, since it is larger than the sum of its proper divisors (114177722).

228355438 is a wasteful number, since it uses less digits than its factorization.

228355438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114177721.

The product of its digits is 230400, while the sum is 40.

The square root of 228355438 is about 15111.4340153408. The cubic root of 228355438 is about 611.2287674314.

The spelling of 228355438 in words is "two hundred twenty-eight million, three hundred fifty-five thousand, four hundred thirty-eight".