28080530 has 16 divisors (see below), whose sum is σ = 51067800. Its totient is φ = 11116032.

The previous prime is 28080527. The next prime is 28080551. The reversal of 28080530 is 3508082.

It can be written as a sum of positive squares in 4 ways, for example, as 27552001 + 528529 = 5249^2 + 727^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28080530.

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 7 ways as a sum of consecutive naturals, for example, 13505 + ... + 15444.

Almost surely, 2^28080530 is an apocalyptic number.

28080530 is a deficient number, since it is larger than the sum of its proper divisors (22987270).

28080530 is a wasteful number, since it uses less digits than its factorization.

28080530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29053.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 28080530 is about 5299.1065284631. The cubic root of 28080530 is about 303.9497334363.

The spelling of 28080530 in words is "twenty-eight million, eighty thousand, five hundred thirty".