12033220 has 24 divisors (see below), whose sum is σ = 25510464. Its totient is φ = 4767456.

The previous prime is 12033211. The next prime is 12033221. The reversal of 12033220 is 2233021.

12033220 = 10² + 11² + ... + 330².

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12033220.

It is not an unprimeable number, because it can be changed into a prime (12033221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672 + ... + 4951.

It is an arithmetic number, because the mean of its divisors is an integer number (1062936).

Almost surely, 2^12033220 is an apocalyptic number.

12033220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12033220 is an abundant number, since it is smaller than the sum of its proper divisors (13477244).

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

12033220 is a wasteful number, since it uses less digits than its factorization.

12033220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5739 (or 5737 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 12033220 is about 3468.8931952425. The cubic root of 12033220 is about 229.1539172338.

Adding to 12033220 its reverse (2233021), we get a palindrome (14266241).

The spelling of 12033220 in words is "twelve million, thirty-three thousand, two hundred twenty".