13312656 has 120 divisors (see below), whose sum is σ = 43640064. Its totient is φ = 3709440.

The previous prime is 13312633. The next prime is 13312657. The reversal of 13312656 is 65621331.

13312656 is a `hidden beast` number, since 1 + 3 + 3 + 1 + 2 + 656 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13312657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47236 + ... + 47516.

Almost surely, 2^13312656 is an apocalyptic number.

13312656 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 13312656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21820032).

13312656 is an abundant number, since it is smaller than the sum of its proper divisors (30327408).

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

13312656 is a wasteful number, since it uses less digits than its factorization.

13312656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 340 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 13312656 is about 3648.6512576567. The cubic root of 13312656 is about 237.0035784323.

Adding to 13312656 its reverse (65621331), we get a palindrome (78933987).

The spelling of 13312656 in words is "thirteen million, three hundred twelve thousand, six hundred fifty-six".