1280938128208 has 20 divisors (see below), whose sum is σ = 2589722738208. Its totient is φ = 612622582880.

The previous prime is 1280938128193. The next prime is 1280938128233. The reversal of 1280938128208 is 8028218390821.

It is a congruent number.

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, 1740404698 + ... + 1740405433.

Almost surely, 2^{1280938128208} is an apocalyptic number.

It is an amenable number.

1280938128208 is an abundant number, since it is smaller than the sum of its proper divisors (1308784610000).

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

1280938128208 is a wasteful number, since it uses less digits than its factorization.

1280938128208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480810162 (or 3480810156 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 52.

The spelling of 1280938128208 in words is "one trillion, two hundred eighty billion, nine hundred thirty-eight million, one hundred twenty-eight thousand, two hundred eight".