1280550022440 has 384 divisors, whose sum is σ = 4372550138880. Its totient is φ = 297929318400.

The previous prime is 1280550022429. The next prime is 1280550022489. The reversal of 1280550022440 is 442200550821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 89410480 + ... + 89424800.

It is an arithmetic number, because the mean of its divisors is an integer number (11386849320).

Almost surely, 2^{1280550022440} is an apocalyptic number.

1280550022440 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 1280550022440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2186275069440).

1280550022440 is an abundant number, since it is smaller than the sum of its proper divisors (3092000116440).

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

1280550022440 is a wasteful number, since it uses less digits than its factorization.

1280550022440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14465 (or 14418 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 33.

The spelling of 1280550022440 in words is "one trillion, two hundred eighty billion, five hundred fifty million, twenty-two thousand, four hundred forty".