12726784 has 80 divisors (see below), whose sum is σ = 30051648. Its totient is φ = 5271552.

The previous prime is 12726773. The next prime is 12726787. The reversal of 12726784 is 48762721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12726787) 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, 189919 + ... + 189985.

Almost surely, 2^12726784 is an apocalyptic number.

12726784 is a gapful number since it is divisible by the number (14) 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 12726784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15025824).

12726784 is an abundant number, since it is smaller than the sum of its proper divisors (17324864).

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

12726784 is an frugal number, since it uses more digits than its factorization.

12726784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 129 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 12726784 is about 3567.4618428233. The cubic root of 12726784 is about 233.4745557793.

The spelling of 12726784 in words is "twelve million, seven hundred twenty-six thousand, seven hundred eighty-four".