280080912 has 80 divisors (see below), whose sum is σ = 738167040. Its totient is φ = 91493376.

The previous prime is 280080907. The next prime is 280080923. The reversal of 280080912 is 219080082.

It is a self number, because there is not a number n which added to its sum of digits gives 280080912.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 883378 + ... + 883694.

It is an arithmetic number, because the mean of its divisors is an integer number (9227088).

Almost surely, 2^280080912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280080912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369083520).

280080912 is an abundant number, since it is smaller than the sum of its proper divisors (458086128).

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

280080912 is a wasteful number, since it uses less digits than its factorization.

280080912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 280080912 is about 16735.6180644755. The cubic root of 280080912 is about 654.2762722824.

The spelling of 280080912 in words is "two hundred eighty million, eighty thousand, nine hundred twelve".