1276808832 has 160 divisors (see below), whose sum is σ = 4092483780. Its totient is φ = 392822784.

The previous prime is 1276808831. The next prime is 1276808843. The reversal of 1276808832 is 2388086721.

It can be written as a sum of positive squares in 2 ways, for example, as 1259966016 + 16842816 = 35496^2 + 4104^2 .

It is not an unprimeable number, because it can be changed into a prime (1276808831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 130048 + ... + 139520.

Almost surely, 2^1276808832 is an apocalyptic number.

1276808832 is a gapful number since it is divisible by the number (12) 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 1276808832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2046241890).

1276808832 is an abundant number, since it is smaller than the sum of its proper divisors (2815674948).

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

1276808832 is an equidigital number, since it uses as much as digits as its factorization.

1276808832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9512 (or 9491 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1276808832 is about 35732.4618799209. The cubic root of 1276808832 is about 1084.8639871411.

The spelling of 1276808832 in words is "one billion, two hundred seventy-six million, eight hundred eight thousand, eight hundred thirty-two".