12789776 has 10 divisors (see below), whose sum is σ = 24780222. Its totient is φ = 6394880.

The previous prime is 12789773. The next prime is 12789811. The reversal of 12789776 is 67798721.

It can be written as a sum of positive squares in only one way, i.e., 11397376 + 1392400 = 3376^2 + 1180^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12789776.

It is not an unprimeable number, because it can be changed into a prime (12789773) 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, 399665 + ... + 399696.

Almost surely, 2^12789776 is an apocalyptic number.

12789776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12789776 is a deficient number, since it is larger than the sum of its proper divisors (11990446).

12789776 is an equidigital number, since it uses as much as digits as its factorization.

12789776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799369 (or 799363 counting only the distinct ones).

The product of its digits is 296352, while the sum is 47.

The square root of 12789776 is about 3576.2796311251. The cubic root of 12789776 is about 233.8591208894.

The spelling of 12789776 in words is "twelve million, seven hundred eighty-nine thousand, seven hundred seventy-six".