228133266 has 32 divisors (see below), whose sum is σ = 492004800. Its totient is φ = 70283520.

The previous prime is 228133223. The next prime is 228133267. The reversal of 228133266 is 662331822.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228133267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19731 + ... + 29078.

It is an arithmetic number, because the mean of its divisors is an integer number (15375150).

Almost surely, 2^228133266 is an apocalyptic number.

228133266 is an abundant number, since it is smaller than the sum of its proper divisors (263871534).

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

228133266 is a wasteful number, since it uses less digits than its factorization.

228133266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48874.

The product of its digits is 20736, while the sum is 33.

The square root of 228133266 is about 15104.0811041255. The cubic root of 228133266 is about 611.0304771652.

The spelling of 228133266 in words is "two hundred twenty-eight million, one hundred thirty-three thousand, two hundred sixty-six".