33406812 has 18 divisors (see below), whose sum is σ = 84445088. Its totient is φ = 11135592.

The previous prime is 33406799. The next prime is 33406817. The reversal of 33406812 is 21860433.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×33406812² = 2232030176006688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33406817) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 463948 + ... + 464019.

Almost surely, 2^33406812 is an apocalyptic number.

It is an amenable number.

33406812 is an abundant number, since it is smaller than the sum of its proper divisors (51038276).

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

33406812 is a wasteful number, since it uses less digits than its factorization.

33406812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927977 (or 927972 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 33406812 is about 5779.8626281253. The cubic root of 33406812 is about 322.0660975636.

The spelling of 33406812 in words is "thirty-three million, four hundred six thousand, eight hundred twelve".