33220432 has 30 divisors (see below), whose sum is σ = 74874858. Its totient is φ = 14236992.

The previous prime is 33220423. The next prime is 33220433. The reversal of 33220432 is 23402233.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 12645136 = 4536^2 + 3556^2 .

It is a super-2 number, since 2×33220432² = 2207194204533248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33220433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20403 + ... + 21970.

Almost surely, 2^33220432 is an apocalyptic number.

It is an amenable number.

33220432 is an abundant number, since it is smaller than the sum of its proper divisors (41654426).

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

33220432 is a wasteful number, since it uses less digits than its factorization.

33220432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42395 (or 42382 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 33220432 is about 5763.7168563350. The cubic root of 33220432 is about 321.4660337383.

Adding to 33220432 its reverse (23402233), we get a palindrome (56622665).

The spelling of 33220432 in words is "thirty-three million, two hundred twenty thousand, four hundred thirty-two".