1276881408 has 280 divisors, whose sum is σ = 4186312416. Its totient is φ = 385689600.

The previous prime is 1276881367. The next prime is 1276881449. The reversal of 1276881408 is 8041886721.

It is an interprime number because it is at equal distance from previous prime (1276881367) and next prime (1276881449).

It is a super-2 number, since 2×1276881408² = 3260852260192124928, which contains 22 as substring.

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 27 ways as a sum of consecutive naturals, for example, 4105573 + ... + 4105883.

Almost surely, 2^1276881408 is an apocalyptic number.

1276881408 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 1276881408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2093156208).

1276881408 is an abundant number, since it is smaller than the sum of its proper divisors (2909431008).

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

1276881408 is an frugal number, since it uses more digits than its factorization.

1276881408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 1276881408 is about 35733.4774126449. The cubic root of 1276881408 is about 1084.8845419271.

The spelling of 1276881408 in words is "one billion, two hundred seventy-six million, eight hundred eighty-one thousand, four hundred eight".