12871728 has 30 divisors (see below), whose sum is σ = 36023364. Its totient is φ = 4290528.

The previous prime is 12871709. The next prime is 12871741. The reversal of 12871728 is 82717821.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12871692 and 12871701.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44550 + ... + 44837.

Almost surely, 2^12871728 is an apocalyptic number.

12871728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12871728 is an abundant number, since it is smaller than the sum of its proper divisors (23151636).

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

12871728 is a wasteful number, since it uses less digits than its factorization.

12871728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89401 (or 89392 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 12871728 is about 3587.7190525458. The cubic root of 12871728 is about 234.3575511277.

The spelling of 12871728 in words is "twelve million, eight hundred seventy-one thousand, seven hundred twenty-eight".