12998656 has 48 divisors (see below), whose sum is σ = 28402920. Its totient is φ = 5898240.

The previous prime is 12998653. The next prime is 12998663. The reversal of 12998656 is 65689921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12998653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22240 + ... + 22816.

Almost surely, 2^12998656 is an apocalyptic number.

12998656 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 12998656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14201460).

12998656 is an abundant number, since it is smaller than the sum of its proper divisors (15404264).

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

12998656 is an equidigital number, since it uses as much as digits as its factorization.

12998656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610 (or 590 counting only the distinct ones).

The product of its digits is 233280, while the sum is 46.

The square root of 12998656 is about 3605.3648913806. The cubic root of 12998656 is about 235.1253654317.

The spelling of 12998656 in words is "twelve million, nine hundred ninety-eight thousand, six hundred fifty-six".