33040440 has 64 divisors (see below), whose sum is σ = 110138400. Its totient is φ = 8810496.

The previous prime is 33040429. The next prime is 33040459. The reversal of 33040440 is 4404033.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 14217 + ... + 16376.

Almost surely, 2^33040440 is an apocalyptic number.

33040440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33040440 is an abundant number, since it is smaller than the sum of its proper divisors (77097960).

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

33040440 is a wasteful number, since it uses less digits than its factorization.

33040440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30613 (or 30603 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 33040440 is about 5748.0814190476. The cubic root of 33040440 is about 320.8844024326.

Adding to 33040440 its reverse (4404033), we get a palindrome (37444473).

The spelling of 33040440 in words is "thirty-three million, forty thousand, four hundred forty".