33809136 has 20 divisors (see below), whose sum is σ = 87340392. Its totient is φ = 11269696.

The previous prime is 33809129. The next prime is 33809159. The reversal of 33809136 is 63190833.

It is a super-2 number, since 2×33809136² = 2286115354132992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33809097 and 33809106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352131 + ... + 352226.

Almost surely, 2^33809136 is an apocalyptic number.

It is an amenable number.

33809136 is an abundant number, since it is smaller than the sum of its proper divisors (53531256).

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

33809136 is a wasteful number, since it uses less digits than its factorization.

33809136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704368 (or 704362 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 33809136 is about 5814.5624082987. The cubic root of 33809136 is about 323.3538410015.

Adding to 33809136 its reverse (63190833), we get a palindrome (96999969).

The spelling of 33809136 in words is "thirty-three million, eight hundred nine thousand, one hundred thirty-six".