228865239 has 24 divisors (see below), whose sum is σ = 347819472. Its totient is φ = 144823680.

The previous prime is 228865193. The next prime is 228865243. The reversal of 228865239 is 932568822.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-228865239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228865194 and 228865203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228865139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5272 + ... + 22034.

It is an arithmetic number, because the mean of its divisors is an integer number (14492478).

Almost surely, 2^228865239 is an apocalyptic number.

228865239 is a deficient number, since it is larger than the sum of its proper divisors (118954233).

228865239 is a wasteful number, since it uses less digits than its factorization.

228865239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16847 (or 16844 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 228865239 is about 15128.2926663917. The cubic root of 228865239 is about 611.6832831954.

The spelling of 228865239 in words is "two hundred twenty-eight million, eight hundred sixty-five thousand, two hundred thirty-nine".