12144840 has 32 divisors (see below), whose sum is σ = 36434880. Its totient is φ = 3238592.

The previous prime is 12144829. The next prime is 12144859. The reversal of 12144840 is 4844121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12144840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50484 + ... + 50723.

It is an arithmetic number, because the mean of its divisors is an integer number (1138590).

Almost surely, 2^12144840 is an apocalyptic number.

12144840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12144840 is an abundant number, since it is smaller than the sum of its proper divisors (24290040).

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

12144840 is a wasteful number, since it uses less digits than its factorization.

12144840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101221 (or 101217 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 12144840 is about 3484.9447628334. The cubic root of 12144840 is about 229.8602806105.

Adding to 12144840 its reverse (4844121), we get a palindrome (16988961).

The spelling of 12144840 in words is "twelve million, one hundred forty-four thousand, eight hundred forty".