12791340 has 72 divisors (see below), whose sum is σ = 39115440. Its totient is φ = 3383424.

The previous prime is 12791333. The next prime is 12791341. The reversal of 12791340 is 4319721.

12791340 = T₂₈₅ + T₂₈₆ + ... + T₄₆₃.

It is not an unprimeable number, because it can be changed into a prime (12791341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32022 + ... + 32418.

It is an arithmetic number, because the mean of its divisors is an integer number (543270).

Almost surely, 2^12791340 is an apocalyptic number.

12791340 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 12791340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19557720).

12791340 is an abundant number, since it is smaller than the sum of its proper divisors (26324100).

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

12791340 is a wasteful number, since it uses less digits than its factorization.

12791340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 12791340 is about 3576.4982874314. The cubic root of 12791340 is about 233.8686530020.

It can be divided in two parts, 12791 and 340, that added together give a palindrome (13131).

The spelling of 12791340 in words is "twelve million, seven hundred ninety-one thousand, three hundred forty".