12344240 has 20 divisors (see below), whose sum is σ = 28700544. Its totient is φ = 4937664.

The previous prime is 12344237. The next prime is 12344251. The reversal of 12344240 is 4244321.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×12344240² = 304760522355200, which contains 22 as substring.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 77072 + ... + 77231.

Almost surely, 2^12344240 is an apocalyptic number.

12344240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12344240 is an abundant number, since it is smaller than the sum of its proper divisors (16356304).

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

12344240 is a wasteful number, since it uses less digits than its factorization.

12344240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154316 (or 154310 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 12344240 is about 3513.4370636173. The cubic root of 12344240 is about 231.1114446357. Note that the first 3 decimals are identical.

Adding to 12344240 its reverse (4244321), we get a palindrome (16588561).

The spelling of 12344240 in words is "twelve million, three hundred forty-four thousand, two hundred forty".