33040645 has 16 divisors (see below), whose sum is σ = 43505280. Its totient is φ = 23889600.

The previous prime is 33040633. The next prime is 33040661. The reversal of 33040645 is 54604033.

It is not a de Polignac number, because 33040645 - 2⁵ = 33040613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8296 + ... + 11614.

It is an arithmetic number, because the mean of its divisors is an integer number (2719080).

Almost surely, 2^33040645 is an apocalyptic number.

33040645 is the 3319-th octagonal number.

It is an amenable number.

33040645 is a deficient number, since it is larger than the sum of its proper divisors (10464635).

33040645 is a wasteful number, since it uses less digits than its factorization.

33040645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3516.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 33040645 is about 5748.0992510568. The cubic root of 33040645 is about 320.8850660756.

Adding to 33040645 its reverse (54604033), we get a palindrome (87644678).

The spelling of 33040645 in words is "thirty-three million, forty thousand, six hundred forty-five".