1280328227520 has 224 divisors, whose sum is σ = 4098902607360. Its totient is φ = 338580602880.

The previous prime is 1280328227513. The next prime is 1280328227599. The reversal of 1280328227520 is 257228230821.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256422144 + ... + 256427136.

Almost surely, 2^{1280328227520} is an apocalyptic number.

1280328227520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280328227520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2049451303680).

1280328227520 is an abundant number, since it is smaller than the sum of its proper divisors (2818574379840).

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

1280328227520 is a wasteful number, since it uses less digits than its factorization.

1280328227520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7183 (or 7173 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 1280328227520 in words is "one trillion, two hundred eighty billion, three hundred twenty-eight million, two hundred twenty-seven thousand, five hundred twenty".