13406656 has 28 divisors (see below), whose sum is σ = 27175968. Its totient is φ = 6559232.

The previous prime is 13406651. The next prime is 13406711. The reversal of 13406656 is 65660431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13406651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780 + ... + 5236.

Almost surely, 2^13406656 is an apocalyptic number.

13406656 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 13406656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13587984).

13406656 is an abundant number, since it is smaller than the sum of its proper divisors (13769312).

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

13406656 is an equidigital number, since it uses as much as digits as its factorization.

13406656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516 (or 4506 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 13406656 is about 3661.5100709953. The cubic root of 13406656 is about 237.5600941192.

The spelling of 13406656 in words is "thirteen million, four hundred six thousand, six hundred fifty-six".