12713840 has 20 divisors (see below), whose sum is σ = 29559864. Its totient is φ = 5085504.

The previous prime is 12713839. The next prime is 12713849. The reversal of 12713840 is 4831721.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12713849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79382 + ... + 79541.

Almost surely, 2^12713840 is an apocalyptic number.

12713840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12713840 is an abundant number, since it is smaller than the sum of its proper divisors (16846024).

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

12713840 is a wasteful number, since it uses less digits than its factorization.

12713840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158936 (or 158930 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 12713840 is about 3565.6472063287. The cubic root of 12713840 is about 233.3953757919.

The spelling of 12713840 in words is "twelve million, seven hundred thirteen thousand, eight hundred forty".