12791856 has 80 divisors (see below), whose sum is σ = 41211648. Its totient is φ = 3321600.

The previous prime is 12791833. The next prime is 12791869. The reversal of 12791856 is 65819721.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1966 + ... + 5426.

Almost surely, 2^12791856 is an apocalyptic number.

12791856 is a gapful number since it is divisible by the number (16) 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 12791856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20605824).

12791856 is an abundant number, since it is smaller than the sum of its proper divisors (28419792).

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

12791856 is a wasteful number, since it uses less digits than its factorization.

12791856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490 (or 3484 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 12791856 is about 3576.5704243031. The cubic root of 12791856 is about 233.8717976974.

The spelling of 12791856 in words is "twelve million, seven hundred ninety-one thousand, eight hundred fifty-six".