280440404480 has 80 divisors (see below), whose sum is σ = 683423014824. Its totient is φ = 110337146880.

The previous prime is 280440404441. The next prime is 280440404501. The reversal of 280440404480 is 84404044082.

It can be written as a sum of positive squares in 4 ways, for example, as 120581173504 + 159859230976 = 347248^2 + 399824^2 .

It is a tau number, because it is divible by the number of its divisors (80).

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, 741767 + ... + 1054086.

Almost surely, 2^280440404480 is an apocalyptic number.

280440404480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280440404480 is an abundant number, since it is smaller than the sum of its proper divisors (402982610344).

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

280440404480 is an equidigital number, since it uses as much as digits as its factorization.

280440404480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795937 (or 1795921 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 38.

The spelling of 280440404480 in words is "two hundred eighty billion, four hundred forty million, four hundred four thousand, four hundred eighty".