280530485 has 16 divisors (see below), whose sum is σ = 357663600. Its totient is φ = 210825216.

The previous prime is 280530469. The next prime is 280530493. The reversal of 280530485 is 584035082.

It can be written as a sum of positive squares in 8 ways, for example, as 4937284 + 275593201 = 2222^2 + 16601^2 .

It is a cyclic number.

It is not a de Polignac number, because 280530485 - 2⁴ = 280530469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20780 + ... + 31509.

It is an arithmetic number, because the mean of its divisors is an integer number (22353975).

Almost surely, 2^280530485 is an apocalyptic number.

It is an amenable number.

280530485 is a deficient number, since it is larger than the sum of its proper divisors (77133115).

280530485 is a wasteful number, since it uses less digits than its factorization.

280530485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52360.

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 280530485 is about 16749.0443010937. The cubic root of 280530485 is about 654.6261565378.

The spelling of 280530485 in words is "two hundred eighty million, five hundred thirty thousand, four hundred eighty-five".