12728196 has 36 divisors (see below), whose sum is σ = 34650252. Its totient is φ = 3916224.

The previous prime is 12728179. The next prime is 12728203. The reversal of 12728196 is 69182721.

It can be written as a sum of positive squares in 2 ways, for example, as 4260096 + 8468100 = 2064^2 + 2910^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12728196.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13131 + ... + 14066.

It is an arithmetic number, because the mean of its divisors is an integer number (962507).

Almost surely, 2^12728196 is an apocalyptic number.

It is an amenable number.

12728196 is an abundant number, since it is smaller than the sum of its proper divisors (21922056).

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

12728196 is a wasteful number, since it uses less digits than its factorization.

12728196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27220 (or 27215 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 12728196 is about 3567.6597371386. The cubic root of 12728196 is about 233.4831899029.

The spelling of 12728196 in words is "twelve million, seven hundred twenty-eight thousand, one hundred ninety-six".