281285456280 has 256 divisors, whose sum is σ = 876457221120. Its totient is φ = 72180566016.

The previous prime is 281285456269. The next prime is 281285456293. The reversal of 281285456280 is 82654582182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70091554 + ... + 70095566.

It is an arithmetic number, because the mean of its divisors is an integer number (3423661020).

Almost surely, 2^281285456280 is an apocalyptic number.

281285456280 is a gapful number since it is divisible by the number (20) 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 281285456280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438228610560).

281285456280 is an abundant number, since it is smaller than the sum of its proper divisors (595171764840).

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

281285456280 is a wasteful number, since it uses less digits than its factorization.

281285456280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290 (or 4286 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 51.

The spelling of 281285456280 in words is "two hundred eighty-one billion, two hundred eighty-five million, four hundred fifty-six thousand, two hundred eighty".