33129992 has 32 divisors (see below), whose sum is σ = 71305920. Its totient is φ = 14136000.

The previous prime is 33129973. The next prime is 33129997. The reversal of 33129992 is 29992133.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (33129997) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12878 + ... + 15234.

It is an arithmetic number, because the mean of its divisors is an integer number (2228310).

Almost surely, 2^33129992 is an apocalyptic number.

It is an amenable number.

33129992 is an abundant number, since it is smaller than the sum of its proper divisors (38175928).

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

33129992 is a wasteful number, since it uses less digits than its factorization.

33129992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621 (or 2617 counting only the distinct ones).

The product of its digits is 26244, while the sum is 38.

The square root of 33129992 is about 5755.8658775201. The cubic root of 33129992 is about 321.1740466523.

The spelling of 33129992 in words is "thirty-three million, one hundred twenty-nine thousand, nine hundred ninety-two".