1271444480 has 88 divisors (see below), whose sum is σ = 3070303488. Its totient is φ = 505192448.

The previous prime is 1271444443. The next prime is 1271444483. The reversal of 1271444480 is 844441721.

It is a self number, because there is not a number n which added to its sum of digits gives 1271444480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271444483) 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 7 ways as a sum of consecutive naturals, for example, 854297 + ... + 855783.

Almost surely, 2^1271444480 is an apocalyptic number.

1271444480 is a gapful number since it is divisible by the number (10) 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 1271444480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1535151744).

1271444480 is an abundant number, since it is smaller than the sum of its proper divisors (1798859008).

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

1271444480 is a wasteful number, since it uses less digits than its factorization.

1271444480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 1271444480 is about 35657.3201460794. The cubic root of 1271444480 is about 1083.3425478243.

The spelling of 1271444480 in words is "one billion, two hundred seventy-one million, four hundred forty-four thousand, four hundred eighty".