133118428 has 6 divisors (see below), whose sum is σ = 232957256. Its totient is φ = 66559212.

The previous prime is 133118417. The next prime is 133118437. The reversal of 133118428 is 824811331.

It is a self number, because there is not a number n which added to its sum of digits gives 133118428.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16639800 + ... + 16639807.

Almost surely, 2^133118428 is an apocalyptic number.

It is an amenable number.

133118428 is a deficient number, since it is larger than the sum of its proper divisors (99838828).

133118428 is a wasteful number, since it uses less digits than its factorization.

133118428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33279611 (or 33279609 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 133118428 is about 11537.6959571658. The cubic root of 133118428 is about 510.5983340257.

Adding to 133118428 its reverse (824811331), we get a palindrome (957929759).

The spelling of 133118428 in words is "one hundred thirty-three million, one hundred eighteen thousand, four hundred twenty-eight".