12680840 has 16 divisors (see below), whose sum is σ = 28531980. Its totient is φ = 5072320.

The previous prime is 12680839. The next prime is 12680851. The reversal of 12680840 is 4808621.

12680840 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 2 ways, for example, as 12124324 + 556516 = 3482^2 + 746^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 158471 + ... + 158550.

Almost surely, 2^12680840 is an apocalyptic number.

12680840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12680840 is an abundant number, since it is smaller than the sum of its proper divisors (15851140).

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

12680840 is a wasteful number, since it uses less digits than its factorization.

12680840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317032 (or 317028 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 12680840 is about 3561.0167087505. The cubic root of 12680840 is about 233.1932674116.

The spelling of 12680840 in words is "twelve million, six hundred eighty thousand, eight hundred forty".