12544840 has 64 divisors (see below), whose sum is σ = 35199360. Its totient is φ = 3909120.

The previous prime is 12544799. The next prime is 12544843. The reversal of 12544840 is 4844521.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 12544799 and 12544808.

It is not an unprimeable number, because it can be changed into a prime (12544843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1044 + ... + 5116.

It is an arithmetic number, because the mean of its divisors is an integer number (549990).

Almost surely, 2^12544840 is an apocalyptic number.

12544840 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 12544840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17599680).

12544840 is an abundant number, since it is smaller than the sum of its proper divisors (22654520).

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

12544840 is a wasteful number, since it uses less digits than its factorization.

12544840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4102 (or 4098 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 12544840 is about 3541.8695628157. The cubic root of 12544840 is about 232.3566156426.

The spelling of 12544840 in words is "twelve million, five hundred forty-four thousand, eight hundred forty".