12713640 has 64 divisors (see below), whose sum is σ = 38880000. Its totient is φ = 3324672.

The previous prime is 12713639. The next prime is 12713647. The reversal of 12713640 is 4631721.

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 12713640.

It is not an unprimeable number, because it can be changed into a prime (12713647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5361 + ... + 7359.

It is an arithmetic number, because the mean of its divisors is an integer number (607500).

Almost surely, 2^12713640 is an apocalyptic number.

12713640 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 12713640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19440000).

12713640 is an abundant number, since it is smaller than the sum of its proper divisors (26166360).

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

12713640 is a wasteful number, since it uses less digits than its factorization.

12713640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 12713640 is about 3565.6191608191. The cubic root of 12713640 is about 233.3941519466.

The spelling of 12713640 in words is "twelve million, seven hundred thirteen thousand, six hundred forty".