33438642 has 16 divisors (see below), whose sum is σ = 69785280. Its totient is φ = 10661552.

The previous prime is 33438637. The next prime is 33438659. The reversal of 33438642 is 24683433.

It is a super-2 number, since 2×33438642² = 2236285557608328, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 121017 + ... + 121292.

It is an arithmetic number, because the mean of its divisors is an integer number (4361580).

Almost surely, 2^33438642 is an apocalyptic number.

33438642 is an abundant number, since it is smaller than the sum of its proper divisors (36346638).

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

33438642 is a wasteful number, since it uses less digits than its factorization.

33438642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242337.

The product of its digits is 41472, while the sum is 33.

The square root of 33438642 is about 5782.6154981980. The cubic root of 33438642 is about 322.1683532530.

The spelling of 33438642 in words is "thirty-three million, four hundred thirty-eight thousand, six hundred forty-two".