33040240 has 40 divisors (see below), whose sum is σ = 80865360. Its totient is φ = 12519936.

The previous prime is 33040229. The next prime is 33040243. The reversal of 33040240 is 4204033.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33040243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9349 + ... + 12388.

It is an arithmetic number, because the mean of its divisors is an integer number (2021634).

Almost surely, 2^33040240 is an apocalyptic number.

It is an amenable number.

33040240 is an abundant number, since it is smaller than the sum of its proper divisors (47825120).

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

33040240 is a wasteful number, since it uses less digits than its factorization.

33040240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21769 (or 21763 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 33040240 is about 5748.0640219121. The cubic root of 33040240 is about 320.8837549734.

Adding to 33040240 its reverse (4204033), we get a palindrome (37244273).

The spelling of 33040240 in words is "thirty-three million, forty thousand, two hundred forty".