12204040 has 16 divisors (see below), whose sum is σ = 27459180. Its totient is φ = 4881600.

The previous prime is 12204037. The next prime is 12204047. The reversal of 12204040 is 4040221.

It can be written as a sum of positive squares in 2 ways, for example, as 11573604 + 630436 = 3402^2 + 794^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12204040.

It is not an unprimeable number, because it can be changed into a prime (12204047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152511 + ... + 152590.

Almost surely, 2^12204040 is an apocalyptic number.

12204040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12204040 is an abundant number, since it is smaller than the sum of its proper divisors (15255140).

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

12204040 is a wasteful number, since it uses less digits than its factorization.

12204040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305112 (or 305108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 12204040 is about 3493.4281157625. The cubic root of 12204040 is about 230.2331599022.

Adding to 12204040 its reverse (4040221), we get a palindrome (16244261).

The spelling of 12204040 in words is "twelve million, two hundred four thousand, forty".