12728335 has 8 divisors (see below), whose sum is σ = 15446160. Its totient is φ = 10067904.

The previous prime is 12728311. The next prime is 12728341. The reversal of 12728335 is 53382721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12728335 - 2¹⁹ = 12204047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12728297 and 12728306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13857 + ... + 14746.

It is an arithmetic number, because the mean of its divisors is an integer number (1930770).

Almost surely, 2^12728335 is an apocalyptic number.

12728335 is a deficient number, since it is larger than the sum of its proper divisors (2717825).

12728335 is an equidigital number, since it uses as much as digits as its factorization.

12728335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28697.

The product of its digits is 10080, while the sum is 31.

The square root of 12728335 is about 3567.6792176428. The cubic root of 12728335 is about 233.4840398282.

The spelling of 12728335 in words is "twelve million, seven hundred twenty-eight thousand, three hundred thirty-five".