28560505 has 16 divisors (see below), whose sum is σ = 36046800. Its totient is φ = 21692160.

The previous prime is 28560491. The next prime is 28560541. The reversal of 28560505 is 50506582.

It can be written as a sum of positive squares in 8 ways, for example, as 5702544 + 22857961 = 2388^2 + 4781^2 .

It is not a de Polignac number, because 28560505 - 2⁷ = 28560377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7231 + ... + 10459.

It is an arithmetic number, because the mean of its divisors is an integer number (2252925).

Almost surely, 2^28560505 is an apocalyptic number.

It is an amenable number.

28560505 is a deficient number, since it is larger than the sum of its proper divisors (7486295).

28560505 is a wasteful number, since it uses less digits than its factorization.

28560505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 28560505 is about 5344.2029340211. The cubic root of 28560505 is about 305.6717434844.

The spelling of 28560505 in words is "twenty-eight million, five hundred sixty thousand, five hundred five".