12728835 has 48 divisors (see below), whose sum is σ = 26709696. Its totient is φ = 5474304.

The previous prime is 12728831. The next prime is 12728857. The reversal of 12728835 is 53882721.

It is not a de Polignac number, because 12728835 - 2² = 12728831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12728835.

It is not an unprimeable number, because it can be changed into a prime (12728831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4167 + ... + 6543.

It is an arithmetic number, because the mean of its divisors is an integer number (556452).

Almost surely, 2^12728835 is an apocalyptic number.

12728835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12728835 is an abundant number, since it is smaller than the sum of its proper divisors (13980861).

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

12728835 is a wasteful number, since it uses less digits than its factorization.

12728835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412 (or 2409 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 12728835 is about 3567.7492905192. The cubic root of 12728835 is about 233.4870970621.

The spelling of 12728835 in words is "twelve million, seven hundred twenty-eight thousand, eight hundred thirty-five".