12913856 has 56 divisors (see below), whose sum is σ = 27700224. Its totient is φ = 5955840.

The previous prime is 12913853. The next prime is 12913867. The reversal of 12913856 is 65831921.

It is not an unprimeable number, because it can be changed into a prime (12913853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45491 + ... + 45773.

Almost surely, 2^12913856 is an apocalyptic number.

12913856 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 12913856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13850112).

12913856 is an abundant number, since it is smaller than the sum of its proper divisors (14786368).

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

12913856 is a wasteful number, since it uses less digits than its factorization.

12913856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 339 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 12913856 is about 3593.5853962303. The cubic root of 12913856 is about 234.6129497112.

The spelling of 12913856 in words is "twelve million, nine hundred thirteen thousand, eight hundred fifty-six".