1277881344 has 132 divisors (see below), whose sum is σ = 3709999176. Its totient is φ = 423641088.

The previous prime is 1277881331. The next prime is 1277881351. The reversal of 1277881344 is 4431887721.

It is a self number, because there is not a number n which added to its sum of digits gives 1277881344.

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, 2884387 + ... + 2884829.

Almost surely, 2^1277881344 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 1277881344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1854999588).

1277881344 is an abundant number, since it is smaller than the sum of its proper divisors (2432117832).

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

1277881344 is a wasteful number, since it uses less digits than its factorization.

1277881344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 761 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 1277881344 is about 35747.4662598624. The cubic root of 1277881344 is about 1085.1676619438.

The spelling of 1277881344 in words is "one billion, two hundred seventy-seven million, eight hundred eighty-one thousand, three hundred forty-four".