1276929216 has 84 divisors (see below), whose sum is σ = 3665220000. Its totient is φ = 425046528.

The previous prime is 1276929169. The next prime is 1276929263. The reversal of 1276929216 is 6129296721.

It is an interprime number because it is at equal distance from previous prime (1276929169) and next prime (1276929263).

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 637785 + ... + 639783.

Almost surely, 2^1276929216 is an apocalyptic number.

1276929216 is a gapful number since it is divisible by the number (16) 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 1276929216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1832610000).

1276929216 is an abundant number, since it is smaller than the sum of its proper divisors (2388290784).

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

1276929216 is a wasteful number, since it uses less digits than its factorization.

1276929216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126 (or 3113 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1276929216 is about 35734.1463589100. The cubic root of 1276929216 is about 1084.8980815591.

The spelling of 1276929216 in words is "one billion, two hundred seventy-six million, nine hundred twenty-nine thousand, two hundred sixteen".