12209240 has 16 divisors (see below), whose sum is σ = 27470880. Its totient is φ = 4883680.

The previous prime is 12209233. The next prime is 12209269. The reversal of 12209240 is 4290221.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 3 ways as a sum of consecutive naturals, for example, 152576 + ... + 152655.

It is an arithmetic number, because the mean of its divisors is an integer number (1716930).

Almost surely, 2^12209240 is an apocalyptic number.

12209240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12209240 is an abundant number, since it is smaller than the sum of its proper divisors (15261640).

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

12209240 is a wasteful number, since it uses less digits than its factorization.

12209240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305242 (or 305238 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 12209240 is about 3494.1722911156. The cubic root of 12209240 is about 230.2658551527.

Adding to 12209240 its reverse (4290221), we get a palindrome (16499461).

The spelling of 12209240 in words is "twelve million, two hundred nine thousand, two hundred forty".