33838381 has 4 divisors (see below), whose sum is σ = 35828892. Its totient is φ = 31847872.

The previous prime is 33838361. The next prime is 33838393. The reversal of 33838381 is 18383833.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9424900 + 24413481 = 3070^2 + 4941^2 .

It is a cyclic number.

It is not a de Polignac number, because 33838381 - 2⁵ = 33838349 is a prime.

It is a super-2 number, since 2×33838381² = 2290072057402322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33838381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33838351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995230 + ... + 995263.

It is an arithmetic number, because the mean of its divisors is an integer number (8957223).

Almost surely, 2^33838381 is an apocalyptic number.

It is an amenable number.

33838381 is a deficient number, since it is larger than the sum of its proper divisors (1990511).

33838381 is a wasteful number, since it uses less digits than its factorization.

33838381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990510.

The product of its digits is 41472, while the sum is 37.

The square root of 33838381 is about 5817.0766713187. The cubic root of 33838381 is about 323.4470481331.

The spelling of 33838381 in words is "thirty-three million, eight hundred thirty-eight thousand, three hundred eighty-one".