280220680904 has 16 divisors (see below), whose sum is σ = 525458356620. Its totient is φ = 140098452480.

The previous prime is 280220680879. The next prime is 280220680907. The reversal of 280220680904 is 409086022082.

It can be written as a sum of positive squares in 2 ways, for example, as 261888062500 + 18332618404 = 511750^2 + 135398^2 .

It is not an unprimeable number, because it can be changed into a prime (280220680907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385417 + ... + 1574744.

Almost surely, 2^280220680904 is an apocalyptic number.

It is an amenable number.

280220680904 is a deficient number, since it is larger than the sum of its proper divisors (245237675716).

280220680904 is a wasteful number, since it uses less digits than its factorization.

280220680904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972000 (or 2971996 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 280220680904 in words is "two hundred eighty billion, two hundred twenty million, six hundred eighty thousand, nine hundred four".