1276808828 has 12 divisors (see below), whose sum is σ = 2237528160. Its totient is φ = 637515072.

The previous prime is 1276808803. The next prime is 1276808831. The reversal of 1276808828 is 8288086721.

It is a congruent number.

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, 219101 + ... + 224852.

It is an arithmetic number, because the mean of its divisors is an integer number (186460680).

Almost surely, 2^1276808828 is an apocalyptic number.

It is an amenable number.

1276808828 is a deficient number, since it is larger than the sum of its proper divisors (960719332).

1276808828 is a wasteful number, since it uses less digits than its factorization.

1276808828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444676 (or 444674 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 50.

The square root of 1276808828 is about 35732.4618239494. The cubic root of 1276808828 is about 1084.8639860082.

The spelling of 1276808828 in words is "one billion, two hundred seventy-six million, eight hundred eight thousand, eight hundred twenty-eight".