12649808 has 10 divisors (see below), whose sum is σ = 24509034. Its totient is φ = 6324896.

The previous prime is 12649807. The next prime is 12649823. The reversal of 12649808 is 80894621.

It can be written as a sum of positive squares in only one way, i.e., 12588304 + 61504 = 3548^2 + 248^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395291 + ... + 395322.

Almost surely, 2^12649808 is an apocalyptic number.

It is an amenable number.

12649808 is a deficient number, since it is larger than the sum of its proper divisors (11859226).

12649808 is an equidigital number, since it uses as much as digits as its factorization.

12649808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790621 (or 790615 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 12649808 is about 3556.6568572186. The cubic root of 12649808 is about 233.0028918943.

The spelling of 12649808 in words is "twelve million, six hundred forty-nine thousand, eight hundred eight".