28080275 has 6 divisors (see below), whose sum is σ = 34819572. Its totient is φ = 22464200.

The previous prime is 28080257. The next prime is 28080289. The reversal of 28080275 is 57208082.

It is not a de Polignac number, because 28080275 - 2⁶ = 28080211 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 561581 + ... + 561630.

It is an arithmetic number, because the mean of its divisors is an integer number (5803262).

Almost surely, 2^28080275 is an apocalyptic number.

28080275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28080275 is a deficient number, since it is larger than the sum of its proper divisors (6739297).

28080275 is a wasteful number, since it uses less digits than its factorization.

28080275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123221 (or 1123216 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 28080275 is about 5299.0824677485. The cubic root of 28080275 is about 303.9488133751.

The spelling of 28080275 in words is "twenty-eight million, eighty thousand, two hundred seventy-five".