12864778 has 8 divisors (see below), whose sum is σ = 19613700. Its totient is φ = 6326880.

The previous prime is 12864763. The next prime is 12864791. The reversal of 12864778 is 87746821.

It can be written as a sum of positive squares in 2 ways, for example, as 11309769 + 1555009 = 3363^2 + 1247^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52603 + ... + 52846.

Almost surely, 2^12864778 is an apocalyptic number.

12864778 is a deficient number, since it is larger than the sum of its proper divisors (6748922).

12864778 is a wasteful number, since it uses less digits than its factorization.

12864778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105512.

The product of its digits is 150528, while the sum is 43.

The square root of 12864778 is about 3586.7503397923. The cubic root of 12864778 is about 234.3153636239.

The spelling of 12864778 in words is "twelve million, eight hundred sixty-four thousand, seven hundred seventy-eight".