12765728 has 24 divisors (see below), whose sum is σ = 25224192. Its totient is φ = 6359616.

The previous prime is 12765721. The next prime is 12765751. The reversal of 12765728 is 82756721.

It is a super-2 number, since 2×12765728² = 325927622739968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12765691 and 12765700.

It is not an unprimeable number, because it can be changed into a prime (12765721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11201 + ... + 12287.

It is an arithmetic number, because the mean of its divisors is an integer number (1051008).

Almost surely, 2^12765728 is an apocalyptic number.

It is an amenable number.

12765728 is a deficient number, since it is larger than the sum of its proper divisors (12458464).

12765728 is a wasteful number, since it uses less digits than its factorization.

12765728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464 (or 1456 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 12765728 is about 3572.9158960155. The cubic root of 12765728 is about 233.7124575813.

The spelling of 12765728 in words is "twelve million, seven hundred sixty-five thousand, seven hundred twenty-eight".