12728469 has 16 divisors (see below), whose sum is σ = 18345600. Its totient is φ = 7803456.

The previous prime is 12728447. The next prime is 12728479. The reversal of 12728469 is 96482721.

It is not a de Polignac number, because 12728469 - 2⁷ = 12728341 is a prime.

It is a super-2 number, since 2×12728469² = 324027846167922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12728479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14752 + ... + 15590.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^12728469 is an apocalyptic number.

It is an amenable number.

12728469 is a deficient number, since it is larger than the sum of its proper divisors (5617131).

12728469 is a wasteful number, since it uses less digits than its factorization.

12728469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244.

The product of its digits is 48384, while the sum is 39.

The square root of 12728469 is about 3567.6979973086. The cubic root of 12728469 is about 233.4848591747.

The spelling of 12728469 in words is "twelve million, seven hundred twenty-eight thousand, four hundred sixty-nine".