280806912000 has 1248 divisors, whose sum is σ = 1095817404864. Its totient is φ = 71663616000.

The previous prime is 280806911989. The next prime is 280806912013. The reversal of 280806912000 is 219608082.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4603391970 + ... + 4603392030.

It is an arithmetic number, because the mean of its divisors is an integer number (878058818).

Almost surely, 2^280806912000 is an apocalyptic number.

280806912000 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 280806912000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547908702432).

280806912000 is an abundant number, since it is smaller than the sum of its proper divisors (815010492864).

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

280806912000 is an frugal number, since it uses more digits than its factorization.

280806912000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 280806912000 in words is "two hundred eighty billion, eight hundred six million, nine hundred twelve thousand".