33320412 has 72 divisors (see below), whose sum is σ = 88350080. Its totient is φ = 10575360.

The previous prime is 33320407. The next prime is 33320429. The reversal of 33320412 is 21402333.

It is a super-2 number, since 2×33320412² = 2220499711699488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81264 + ... + 81672.

Almost surely, 2^33320412 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 33320412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44175040).

33320412 is an abundant number, since it is smaller than the sum of its proper divisors (55029668).

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

33320412 is a wasteful number, since it uses less digits than its factorization.

33320412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 33320412 is about 5772.3835631392. The cubic root of 33320412 is about 321.7882047935.

Adding to 33320412 its reverse (21402333), we get a palindrome (54722745).

The spelling of 33320412 in words is "thirty-three million, three hundred twenty thousand, four hundred twelve".