1276880064 has 224 divisors, whose sum is σ = 3745748160. Its totient is φ = 382205952.

The previous prime is 1276880053. The next prime is 1276880069. The reversal of 1276880064 is 4600886721.

It is a junction number, because it is equal to n+sod(n) for n = 1276879998 and 1276880025.

It is not an unprimeable number, because it can be changed into a prime (1276880069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11714442 + ... + 11714550.

It is an arithmetic number, because the mean of its divisors is an integer number (16722090).

Almost surely, 2^1276880064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276880064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1872874080).

1276880064 is an abundant number, since it is smaller than the sum of its proper divisors (2468868096).

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

1276880064 is a wasteful number, since it uses less digits than its factorization.

1276880064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 1276880064 is about 35733.4586067456. The cubic root of 1276880064 is about 1084.8841612900.

The spelling of 1276880064 in words is "one billion, two hundred seventy-six million, eight hundred eighty thousand, sixty-four".