33340640 has 24 divisors (see below), whose sum is σ = 78767640. Its totient is φ = 13336192.

The previous prime is 33340631. The next prime is 33340651. The reversal of 33340640 is 4604333.

It is a super-2 number, since 2×33340640² = 2223196551219200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104030 + ... + 104349.

It is an arithmetic number, because the mean of its divisors is an integer number (3281985).

Almost surely, 2^33340640 is an apocalyptic number.

It is an amenable number.

33340640 is an abundant number, since it is smaller than the sum of its proper divisors (45427000).

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

33340640 is a wasteful number, since it uses less digits than its factorization.

33340640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208394 (or 208386 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 33340640 is about 5774.1354331190. The cubic root of 33340640 is about 321.8533081809.

Adding to 33340640 its reverse (4604333), we get a palindrome (37944973).

The spelling of 33340640 in words is "thirty-three million, three hundred forty thousand, six hundred forty".