1276328799 has 16 divisors (see below), whose sum is σ = 1894636800. Its totient is φ = 849185208.

The previous prime is 1276328777. The next prime is 1276328821. The reversal of 1276328799 is 9978236721.

1276328799 is a `hidden beast` number, since 1 + 276 + 3 + 287 + 99 = 666.

It is an interprime number because it is at equal distance from previous prime (1276328777) and next prime (1276328821).

It is not a de Polignac number, because 1276328799 - 2⁷ = 1276328671 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276328759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33409 + ... + 60570.

It is an arithmetic number, because the mean of its divisors is an integer number (118414800).

Almost surely, 2^1276328799 is an apocalyptic number.

1276328799 is a deficient number, since it is larger than the sum of its proper divisors (618308001).

1276328799 is an equidigital number, since it uses as much as digits as its factorization.

1276328799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94491 (or 94485 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 1276328799 is about 35725.7442049847. The cubic root of 1276328799 is about 1084.7280138254.

The spelling of 1276328799 in words is "one billion, two hundred seventy-six million, three hundred twenty-eight thousand, seven hundred ninety-nine".