1280780050 has 24 divisors (see below), whose sum is σ = 2598820272. Its totient is φ = 465738000.

The previous prime is 1280780027. The next prime is 1280780071. The reversal of 1280780050 is 500870821.

It is a junction number, because it is equal to n+sod(n) for n = 1280779994 and 1280780021.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1163796 + ... + 1164895.

It is an arithmetic number, because the mean of its divisors is an integer number (108284178).

Almost surely, 2^1280780050 is an apocalyptic number.

1280780050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1280780050 is an abundant number, since it is smaller than the sum of its proper divisors (1318040222).

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

1280780050 is a wasteful number, since it uses less digits than its factorization.

1280780050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328714 (or 2328709 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1280780050 is about 35787.9875097776. The cubic root of 1280780050 is about 1085.9875624178.

The spelling of 1280780050 in words is "one billion, two hundred eighty million, seven hundred eighty thousand, fifty".