28005266 has 16 divisors (see below), whose sum is σ = 42625440. Its totient is φ = 13798560.

The previous prime is 28005247. The next prime is 28005269. The reversal of 28005266 is 66250082.

It is not an unprimeable number, because it can be changed into a prime (28005269) by changing a digit.

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, 48761 + ... + 49331.

It is an arithmetic number, because the mean of its divisors is an integer number (2664090).

Almost surely, 2^28005266 is an apocalyptic number.

28005266 is a deficient number, since it is larger than the sum of its proper divisors (14620174).

28005266 is a wasteful number, since it uses less digits than its factorization.

28005266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28005266 is about 5292.0001889645. Note that the first 3 decimals coincide. The cubic root of 28005266 is about 303.6779325151.

The spelling of 28005266 in words is "twenty-eight million, five thousand, two hundred sixty-six".