33812138 has 8 divisors (see below), whose sum is σ = 50881188. Its totient is φ = 16851744.

The previous prime is 33812137. The next prime is 33812159. The reversal of 33812138 is 83121833.

33812138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 23164969 + 10647169 = 4813^2 + 3263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×33812138² = 2286521352262088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33812138.

It is not an unprimeable number, because it can be changed into a prime (33812137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26381 + ... + 27632.

Almost surely, 2^33812138 is an apocalyptic number.

33812138 is a deficient number, since it is larger than the sum of its proper divisors (17069050).

33812138 is a wasteful number, since it uses less digits than its factorization.

33812138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54328.

The product of its digits is 3456, while the sum is 29.

The square root of 33812138 is about 5814.8205475320. The cubic root of 33812138 is about 323.3634111909.

The spelling of 33812138 in words is "thirty-three million, eight hundred twelve thousand, one hundred thirty-eight".