33132440 has 64 divisors (see below), whose sum is σ = 81920160. Its totient is φ = 11960320.

The previous prime is 33132433. The next prime is 33132467. The reversal of 33132440 is 4423133.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112934 + ... + 113226.

Almost surely, 2^33132440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33132440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40960080).

33132440 is an abundant number, since it is smaller than the sum of its proper divisors (48787720).

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

33132440 is a wasteful number, since it uses less digits than its factorization.

33132440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 33132440 is about 5756.0785262190. The cubic root of 33132440 is about 321.1819570547.

Adding to 33132440 its reverse (4423133), we get a palindrome (37555573).

The spelling of 33132440 in words is "thirty-three million, one hundred thirty-two thousand, four hundred forty".