1280055208 has 8 divisors (see below), whose sum is σ = 2400103530. Its totient is φ = 640027600.

The previous prime is 1280055197. The next prime is 1280055211. The reversal of 1280055208 is 8025500821.

It can be written as a sum of positive squares in only one way, i.e., 1230746724 + 49308484 = 35082^2 + 7022^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1280055208.

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 as a sum of consecutive naturals, namely, 80003443 + ... + 80003458.

Almost surely, 2^1280055208 is an apocalyptic number.

It is an amenable number.

1280055208 is a deficient number, since it is larger than the sum of its proper divisors (1120048322).

1280055208 is a wasteful number, since it uses less digits than its factorization.

1280055208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160006907 (or 160006903 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 1280055208 is about 35777.8591869329. The cubic root of 1280055208 is about 1085.7826565768.

The spelling of 1280055208 in words is "one billion, two hundred eighty million, fifty-five thousand, two hundred eight".