33894381 has 4 divisors (see below), whose sum is σ = 45192512. Its totient is φ = 22596252.

The previous prime is 33894361. The next prime is 33894391. The reversal of 33894381 is 18349833.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 33894381 - 2¹³ = 33886189 is a prime.

It is a super-2 number, since 2×33894381² = 2297658126746322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33894361) 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, 5649061 + ... + 5649066.

It is an arithmetic number, because the mean of its divisors is an integer number (11298128).

Almost surely, 2^33894381 is an apocalyptic number.

It is an amenable number.

33894381 is a deficient number, since it is larger than the sum of its proper divisors (11298131).

33894381 is a wasteful number, since it uses less digits than its factorization.

33894381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11298130.

The product of its digits is 62208, while the sum is 39.

The square root of 33894381 is about 5821.8880957985. Note that the first 3 decimals coincide. The cubic root of 33894381 is about 323.6253767197.

The spelling of 33894381 in words is "thirty-three million, eight hundred ninety-four thousand, three hundred eighty-one".