1280716780 has 24 divisors (see below), whose sum is σ = 3073720608. Its totient is φ = 439102848.

The previous prime is 1280716739. The next prime is 1280716799. The reversal of 1280716780 is 876170821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4573849 + ... + 4574128.

It is an arithmetic number, because the mean of its divisors is an integer number (128071692).

Almost surely, 2^1280716780 is an apocalyptic number.

1280716780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280716780 is an abundant number, since it is smaller than the sum of its proper divisors (1793003828).

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

1280716780 is a wasteful number, since it uses less digits than its factorization.

1280716780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9147993 (or 9147991 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 1280716780 is about 35787.1035430363. The cubic root of 1280716780 is about 1085.9696796792.

The spelling of 1280716780 in words is "one billion, two hundred eighty million, seven hundred sixteen thousand, seven hundred eighty".