228109236 has 24 divisors (see below), whose sum is σ = 543580800. Its totient is φ = 74418432.

The previous prime is 228109201. The next prime is 228109237. The reversal of 228109236 is 632901822.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 228109197 and 228109206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228109237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201661 + ... + 202788.

It is an arithmetic number, because the mean of its divisors is an integer number (22649200).

Almost surely, 2^228109236 is an apocalyptic number.

It is an amenable number.

228109236 is an abundant number, since it is smaller than the sum of its proper divisors (315471564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228109236 is a wasteful number, since it uses less digits than its factorization.

228109236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404503 (or 404501 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 228109236 is about 15103.2856028084. The cubic root of 228109236 is about 611.0090224863.

The spelling of 228109236 in words is "two hundred twenty-eight million, one hundred nine thousand, two hundred thirty-six".