12885778 has 8 divisors (see below), whose sum is σ = 19385100. Its totient is φ = 6424080.

The previous prime is 12885751. The next prime is 12885791. The reversal of 12885778 is 87758821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12552849 + 332929 = 3543^2 + 577^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 8533 + ... + 9928.

Almost surely, 2^12885778 is an apocalyptic number.

12885778 is a deficient number, since it is larger than the sum of its proper divisors (6499322).

12885778 is a wasteful number, since it uses less digits than its factorization.

12885778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18812.

The product of its digits is 250880, while the sum is 46.

The square root of 12885778 is about 3589.6765871036. The cubic root of 12885778 is about 234.4427902987.

The spelling of 12885778 in words is "twelve million, eight hundred eighty-five thousand, seven hundred seventy-eight".