280008988320 has 384 divisors, whose sum is σ = 998313361920. Its totient is φ = 65579909120.

The previous prime is 280008988289. The next prime is 280008988333. The reversal of 280008988320 is 23889800082.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 280008988320.

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, 7676686 + ... + 7713074.

It is an arithmetic number, because the mean of its divisors is an integer number (2599774380).

Almost surely, 2^280008988320 is an apocalyptic number.

280008988320 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 280008988320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (499156680960).

280008988320 is an abundant number, since it is smaller than the sum of its proper divisors (718304373600).

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

280008988320 is a wasteful number, since it uses less digits than its factorization.

280008988320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36488 (or 36480 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The spelling of 280008988320 in words is "two hundred eighty billion, eight million, nine hundred eighty-eight thousand, three hundred twenty".