12219280 has 40 divisors (see below), whose sum is σ = 29908800. Its totient is φ = 4629888.

The previous prime is 12219257. The next prime is 12219289. The reversal of 12219280 is 8291221.

12219280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (12219289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2500 + ... + 5539.

It is an arithmetic number, because the mean of its divisors is an integer number (747720).

Almost surely, 2^12219280 is an apocalyptic number.

12219280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12219280 is an abundant number, since it is smaller than the sum of its proper divisors (17689520).

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

12219280 is a wasteful number, since it uses less digits than its factorization.

12219280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8071 (or 8065 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12219280 is about 3495.6086737505. The cubic root of 12219280 is about 230.3289558799.

It can be divided in two parts, 1221 and 9280, that added together give a palindrome (10501).

The spelling of 12219280 in words is "twelve million, two hundred nineteen thousand, two hundred eighty".