33020440 has 32 divisors (see below), whose sum is σ = 74584080. Its totient is φ = 13156992.

The previous prime is 33020437. The next prime is 33020447. The reversal of 33020440 is 4402033.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33020447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9862 + ... + 12778.

Almost surely, 2^33020440 is an apocalyptic number.

It is an amenable number.

33020440 is an abundant number, since it is smaller than the sum of its proper divisors (41563640).

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

33020440 is a wasteful number, since it uses less digits than its factorization.

33020440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211 (or 3207 counting only the distinct ones).

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

The square root of 33020440 is about 5746.3414447803. The cubic root of 33020440 is about 320.8196435755.

Adding to 33020440 its reverse (4402033), we get a palindrome (37422473).

The spelling of 33020440 in words is "thirty-three million, twenty thousand, four hundred forty".