12769778 has 16 divisors (see below), whose sum is σ = 22425984. Its totient is φ = 5339040.

The previous prime is 12769777. The next prime is 12769781. The reversal of 12769778 is 87796721.

It is not an unprimeable number, because it can be changed into a prime (12769777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10550 + ... + 11697.

It is an arithmetic number, because the mean of its divisors is an integer number (1401624).

Almost surely, 2^12769778 is an apocalyptic number.

12769778 is a deficient number, since it is larger than the sum of its proper divisors (9656206).

12769778 is a wasteful number, since it uses less digits than its factorization.

12769778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22297.

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

The square root of 12769778 is about 3573.4826150410. The cubic root of 12769778 is about 233.7371705046.

The spelling of 12769778 in words is "twelve million, seven hundred sixty-nine thousand, seven hundred seventy-eight".