12808978 has 16 divisors (see below), whose sum is σ = 23647680. Its totient is φ = 5067216.

The previous prime is 12808951. The next prime is 12808979. The reversal of 12808978 is 87980821.

It is not an unprimeable number, because it can be changed into a prime (12808979) by changing a digit.

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, 35008 + ... + 35371.

It is an arithmetic number, because the mean of its divisors is an integer number (1477980).

Almost surely, 2^12808978 is an apocalyptic number.

12808978 is a deficient number, since it is larger than the sum of its proper divisors (10838702).

12808978 is a wasteful number, since it uses less digits than its factorization.

12808978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70401.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 12808978 is about 3578.9632577047. The cubic root of 12808978 is about 233.9760975902.

The spelling of 12808978 in words is "twelve million, eight hundred eight thousand, nine hundred seventy-eight".