33138942 has 8 divisors (see below), whose sum is σ = 66277896. Its totient is φ = 11046312.

The previous prime is 33138923. The next prime is 33138949. The reversal of 33138942 is 24983133.

It is a happy number.

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

33138942 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33138949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2761573 + ... + 2761584.

It is an arithmetic number, because the mean of its divisors is an integer number (8284737).

Almost surely, 2^33138942 is an apocalyptic number.

33138942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

33138942 is a wasteful number, since it uses less digits than its factorization.

33138942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5523162.

The product of its digits is 15552, while the sum is 33.

The square root of 33138942 is about 5756.6432927532. The cubic root of 33138942 is about 321.2029655536.

The spelling of 33138942 in words is "thirty-three million, one hundred thirty-eight thousand, nine hundred forty-two".