33381389 has 8 divisors (see below), whose sum is σ = 34524672. Its totient is φ = 32242320.

The previous prime is 33381377. The next prime is 33381391. The reversal of 33381389 is 98318333.

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

It is a cyclic number.

It is not a de Polignac number, because 33381389 - 2⁸ = 33381133 is a prime.

It is a super-2 number, since 2×33381389² = 2228634263138642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33381329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30872 + ... + 31934.

It is an arithmetic number, because the mean of its divisors is an integer number (4315584).

Almost surely, 2^33381389 is an apocalyptic number.

It is an amenable number.

33381389 is a deficient number, since it is larger than the sum of its proper divisors (1143283).

33381389 is a wasteful number, since it uses less digits than its factorization.

33381389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107.

The product of its digits is 46656, while the sum is 38.

The square root of 33381389 is about 5777.6629358245. The cubic root of 33381389 is about 321.9843780598.

The spelling of 33381389 in words is "thirty-three million, three hundred eighty-one thousand, three hundred eighty-nine".