1276908780 has 96 divisors (see below), whose sum is σ = 4147186176. Its totient is φ = 287502336.

The previous prime is 1276908767. The next prime is 1276908799. The reversal of 1276908780 is 878096721.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5452 + ... + 50828.

It is an arithmetic number, because the mean of its divisors is an integer number (43199856).

Almost surely, 2^1276908780 is an apocalyptic number.

1276908780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276908780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2073593088).

1276908780 is an abundant number, since it is smaller than the sum of its proper divisors (2870277396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1276908780 is a wasteful number, since it uses less digits than its factorization.

1276908780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45463 (or 45461 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 48.

The square root of 1276908780 is about 35733.8604127794. The cubic root of 1276908780 is about 1084.8922939515.

The spelling of 1276908780 in words is "one billion, two hundred seventy-six million, nine hundred eight thousand, seven hundred eighty".