13272728 has 40 divisors (see below), whose sum is σ = 29074380. Its totient is φ = 5680080.

The previous prime is 13272719. The next prime is 13272757. The reversal of 13272728 is 82727231.

It is a junction number, because it is equal to n+sod(n) for n = 13272694 and 13272703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18863 + ... + 19553.

Almost surely, 2^13272728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13272728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14537190).

13272728 is an abundant number, since it is smaller than the sum of its proper divisors (15801652).

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

13272728 is an frugal number, since it uses more digits than its factorization.

13272728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 700 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 13272728 is about 3643.1755379065. The cubic root of 13272728 is about 236.7663967261.

Adding to 13272728 its reverse (82727231), we get a palindrome (95999959).

The spelling of 13272728 in words is "thirteen million, two hundred seventy-two thousand, seven hundred twenty-eight".