1271960728 has 16 divisors (see below), whose sum is σ = 2385540000. Its totient is φ = 635816736.

The previous prime is 1271960707. The next prime is 1271960741. The reversal of 1271960728 is 8270691721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16513 + ... + 53071.

It is an arithmetic number, because the mean of its divisors is an integer number (149096250).

Almost surely, 2^1271960728 is an apocalyptic number.

It is an amenable number.

1271960728 is a deficient number, since it is larger than the sum of its proper divisors (1113579272).

1271960728 is a wasteful number, since it uses less digits than its factorization.

1271960728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40914 (or 40910 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 1271960728 is about 35664.5584299035. The cubic root of 1271960728 is about 1083.4891521407.

The spelling of 1271960728 in words is "one billion, two hundred seventy-one million, nine hundred sixty thousand, seven hundred twenty-eight".