12204240 has 80 divisors (see below), whose sum is σ = 38170176. Its totient is φ = 3225600.

The previous prime is 12204239. The next prime is 12204253. The reversal of 12204240 is 4240221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50520 + ... + 50760.

Almost surely, 2^12204240 is an apocalyptic number.

12204240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12204240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19085088).

12204240 is an abundant number, since it is smaller than the sum of its proper divisors (25965936).

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

12204240 is a wasteful number, since it uses less digits than its factorization.

12204240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 12204240 is about 3493.4567408228. The cubic root of 12204240 is about 230.2344175836.

Adding to 12204240 its reverse (4240221), we get a palindrome (16444461).

It can be divided in two parts, 1220 and 4240, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 12204240 in words is "twelve million, two hundred four thousand, two hundred forty".