12928805 has 8 divisors (see below), whose sum is σ = 15540000. Its totient is φ = 10326096.

The previous prime is 12928757. The next prime is 12928813. The reversal of 12928805 is 50882921.

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 12928805 - 2⁸ = 12928549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1946 + ... + 5444.

It is an arithmetic number, because the mean of its divisors is an integer number (1942500).

Almost surely, 2^12928805 is an apocalyptic number.

It is an amenable number.

12928805 is a deficient number, since it is larger than the sum of its proper divisors (2611195).

12928805 is an equidigital number, since it uses as much as digits as its factorization.

12928805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 12928805 is about 3595.6647507797. The cubic root of 12928805 is about 234.7034436359.

The spelling of 12928805 in words is "twelve million, nine hundred twenty-eight thousand, eight hundred five".