33138980 has 24 divisors (see below), whose sum is σ = 79533888. Its totient is φ = 11361888.

The previous prime is 33138971. The next prime is 33138991. The reversal of 33138980 is 8983133.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 33138980.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118214 + ... + 118493.

It is an arithmetic number, because the mean of its divisors is an integer number (3313912).

Almost surely, 2^33138980 is an apocalyptic number.

It is an amenable number.

33138980 is an abundant number, since it is smaller than the sum of its proper divisors (46394908).

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

33138980 is a wasteful number, since it uses less digits than its factorization.

33138980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236723 (or 236721 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 33138980 is about 5756.6465932868. The cubic root of 33138980 is about 321.2030883267.

The spelling of 33138980 in words is "thirty-three million, one hundred thirty-eight thousand, nine hundred eighty".