228639238 has 8 divisors (see below), whose sum is σ = 343252800. Its totient is φ = 114221640.

The previous prime is 228639233. The next prime is 228639253. The reversal of 228639238 is 832936822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 228639194 and 228639203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228639233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46038 + ... + 50761.

It is an arithmetic number, because the mean of its divisors is an integer number (42906600).

Almost surely, 2^228639238 is an apocalyptic number.

228639238 is a deficient number, since it is larger than the sum of its proper divisors (114613562).

228639238 is a wasteful number, since it uses less digits than its factorization.

228639238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97982.

The product of its digits is 248832, while the sum is 43.

The square root of 228639238 is about 15120.8213401257. The cubic root of 228639238 is about 611.4818741874.

The spelling of 228639238 in words is "two hundred twenty-eight million, six hundred thirty-nine thousand, two hundred thirty-eight".