33132640 has 24 divisors (see below), whose sum is σ = 78276240. Its totient is φ = 13252992.

The previous prime is 33132623. The next prime is 33132641. The reversal of 33132640 is 4623133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33132641) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 103380 + ... + 103699.

It is an arithmetic number, because the mean of its divisors is an integer number (3261510).

Almost surely, 2^33132640 is an apocalyptic number.

It is an amenable number.

33132640 is an abundant number, since it is smaller than the sum of its proper divisors (45143600).

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

33132640 is a wasteful number, since it uses less digits than its factorization.

33132640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207094 (or 207086 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 33132640 is about 5756.0958991316. The cubic root of 33132640 is about 321.1826033122.

Adding to 33132640 its reverse (4623133), we get a palindrome (37755773).

The spelling of 33132640 in words is "thirty-three million, one hundred thirty-two thousand, six hundred forty".