133938228 has 24 divisors (see below), whose sum is σ = 322604800. Its totient is φ = 43205760.

The previous prime is 133938193. The next prime is 133938253. The reversal of 133938228 is 822839331.

It is a super-3 number, since 3×133938228³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179653 + ... + 180396.

Almost surely, 2^133938228 is an apocalyptic number.

It is an amenable number.

133938228 is an abundant number, since it is smaller than the sum of its proper divisors (188666572).

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

133938228 is a wasteful number, since it uses less digits than its factorization.

133938228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360087 (or 360085 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 133938228 is about 11573.1684512064. The cubic root of 133938228 is about 511.6443503844.

The spelling of 133938228 in words is "one hundred thirty-three million, nine hundred thirty-eight thousand, two hundred twenty-eight".