12931856 has 80 divisors (see below), whose sum is σ = 30950400. Its totient is φ = 5111424.

The previous prime is 12931843. The next prime is 12931861. The reversal of 12931856 is 65813921.

It is a nialpdrome in base 16.

It is a congruent number.

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, 125501 + ... + 125603.

It is an arithmetic number, because the mean of its divisors is an integer number (386880).

Almost surely, 2^12931856 is an apocalyptic number.

12931856 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 12931856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15475200).

12931856 is an abundant number, since it is smaller than the sum of its proper divisors (18018544).

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

12931856 is a wasteful number, since it uses less digits than its factorization.

12931856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 190 counting only the distinct ones).

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

The square root of 12931856 is about 3596.0889866631. The cubic root of 12931856 is about 234.7219043234.

The spelling of 12931856 in words is "twelve million, nine hundred thirty-one thousand, eight hundred fifty-six".