280805802780 has 24 divisors (see below), whose sum is σ = 786256247952. Its totient is φ = 74881547392.

The previous prime is 280805802743. The next prime is 280805802847. The reversal of 280805802780 is 87208508082.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2340048297 + ... + 2340048416.

It is an arithmetic number, because the mean of its divisors is an integer number (32760676998).

Almost surely, 2^280805802780 is an apocalyptic number.

280805802780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280805802780 is an abundant number, since it is smaller than the sum of its proper divisors (505450445172).

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

280805802780 is a wasteful number, since it uses less digits than its factorization.

280805802780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4680096725 (or 4680096723 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 48.

The spelling of 280805802780 in words is "two hundred eighty billion, eight hundred five million, eight hundred two thousand, seven hundred eighty".