1276768140 has 24 divisors (see below), whose sum is σ = 3574950960. Its totient is φ = 340471488.

The previous prime is 1276768093. The next prime is 1276768151. The reversal of 1276768140 is 418676721.

It is a junction number, because it is equal to n+sod(n) for n = 1276768092 and 1276768101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10639675 + ... + 10639794.

It is an arithmetic number, because the mean of its divisors is an integer number (148956290).

Almost surely, 2^1276768140 is an apocalyptic number.

1276768140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1276768140 is an abundant number, since it is smaller than the sum of its proper divisors (2298182820).

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

1276768140 is a wasteful number, since it uses less digits than its factorization.

1276768140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21279481 (or 21279479 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 1276768140 is about 35731.8924771695. The cubic root of 1276768140 is about 1084.8524621179.

The spelling of 1276768140 in words is "one billion, two hundred seventy-six million, seven hundred sixty-eight thousand, one hundred forty".