280878755760 has 400 divisors, whose sum is σ = 1001475588960. Its totient is φ = 72917176320.

The previous prime is 280878755753. The next prime is 280878755761. The reversal of 280878755760 is 67557878082.

280878755760 is a `hidden beast` number, since 2 + 8 + 0 + 8 + 78 + 7 + 557 + 6 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (280878755761) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 173488231 + ... + 173489849.

Almost surely, 2^280878755760 is an apocalyptic number.

280878755760 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 280878755760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500737794480).

280878755760 is an abundant number, since it is smaller than the sum of its proper divisors (720596833200).

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

280878755760 is a wasteful number, since it uses less digits than its factorization.

280878755760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338 (or 2323 counting only the distinct ones).

The product of its (nonzero) digits is 52684800, while the sum is 63.

The spelling of 280878755760 in words is "two hundred eighty billion, eight hundred seventy-eight million, seven hundred fifty-five thousand, seven hundred sixty".