33129036 has 36 divisors (see below), whose sum is σ = 84035952. Its totient is φ = 11004384.

The previous prime is 33129017. The next prime is 33129037. The reversal of 33129036 is 63092133.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (33129037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9961 + ... + 12863.

It is an arithmetic number, because the mean of its divisors is an integer number (2334332).

Almost surely, 2^33129036 is an apocalyptic number.

33129036 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

33129036 is an abundant number, since it is smaller than the sum of its proper divisors (50906916).

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

33129036 is a wasteful number, since it uses less digits than its factorization.

33129036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230 (or 3225 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 33129036 is about 5755.7828312055. The cubic root of 33129036 is about 321.1709573534.

The spelling of 33129036 in words is "thirty-three million, one hundred twenty-nine thousand, thirty-six".