28270266 has 16 divisors (see below), whose sum is σ = 58999104. Its totient is φ = 9013664.

The previous prime is 28270259. The next prime is 28270301. The reversal of 28270266 is 66207282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102291 + ... + 102566.

It is an arithmetic number, because the mean of its divisors is an integer number (3687444).

Almost surely, 2^28270266 is an apocalyptic number.

28270266 is an abundant number, since it is smaller than the sum of its proper divisors (30728838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28270266 is a wasteful number, since it uses less digits than its factorization.

28270266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204885.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28270266 is about 5316.9790294866. The cubic root of 28270266 is about 304.6327785014.

The spelling of 28270266 in words is "twenty-eight million, two hundred seventy thousand, two hundred sixty-six".