33240432 has 80 divisors (see below), whose sum is σ = 89994240. Its totient is φ = 10560000.

The previous prime is 33240391. The next prime is 33240433. The reversal of 33240432 is 23404233.

It is a super-2 number, since 2×33240432² = 2209852639093248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33240399 and 33240408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33240433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132307 + ... + 132557.

It is an arithmetic number, because the mean of its divisors is an integer number (1124928).

Almost surely, 2^33240432 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 33240432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44997120).

33240432 is an abundant number, since it is smaller than the sum of its proper divisors (56753808).

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

33240432 is a wasteful number, since it uses less digits than its factorization.

33240432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 33240432 is about 5765.4515868230. The cubic root of 33240432 is about 321.5305325069.

Adding to 33240432 its reverse (23404233), we get a palindrome (56644665).

The spelling of 33240432 in words is "thirty-three million, two hundred forty thousand, four hundred thirty-two".