1280708864 has 36 divisors (see below), whose sum is σ = 2560030284. Its totient is φ = 639449088.

The previous prime is 1280708857. The next prime is 1280708881. The reversal of 1280708864 is 4688070821.

It can be written as a sum of positive squares in 2 ways, for example, as 1011748864 + 268960000 = 31808^2 + 16400^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200894 + ... + 207170.

Almost surely, 2^1280708864 is an apocalyptic number.

It is an amenable number.

1280708864 is a deficient number, since it is larger than the sum of its proper divisors (1279321420).

1280708864 is an frugal number, since it uses more digits than its factorization.

1280708864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7090 (or 7076 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 1280708864 is about 35786.9929443646. The cubic root of 1280708864 is about 1085.9674422463.

The spelling of 1280708864 in words is "one billion, two hundred eighty million, seven hundred eight thousand, eight hundred sixty-four".