1276872768 has 112 divisors (see below), whose sum is σ = 3762573120. Its totient is φ = 424627200.

The previous prime is 1276872763. The next prime is 1276872781. The reversal of 1276872768 is 8672786721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1276872763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1314523 + ... + 1315493.

Almost surely, 2^1276872768 is an apocalyptic number.

1276872768 is a gapful number since it is divisible by the number (18) 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 1276872768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881286560).

1276872768 is an abundant number, since it is smaller than the sum of its proper divisors (2485700352).

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

1276872768 is an equidigital number, since it uses as much as digits as its factorization.

1276872768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753 (or 1737 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 1276872768 is about 35733.3565174054. The cubic root of 1276872768 is about 1084.8820949697.

The spelling of 1276872768 in words is "one billion, two hundred seventy-six million, eight hundred seventy-two thousand, seven hundred sixty-eight".