28108166 has 4 divisors (see below), whose sum is σ = 42162252. Its totient is φ = 14054082.

The previous prime is 28108109. The next prime is 28108177. The reversal of 28108166 is 66180182.

It is a semiprime because it is the product of two primes.

It is a congruent 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 as a sum of consecutive naturals, namely, 7027040 + ... + 7027043.

It is an arithmetic number, because the mean of its divisors is an integer number (10540563).

Almost surely, 2^28108166 is an apocalyptic number.

28108166 is a deficient number, since it is larger than the sum of its proper divisors (14054086).

28108166 is a wasteful number, since it uses less digits than its factorization.

28108166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14054085.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 28108166 is about 5301.7134965971. The cubic root of 28108166 is about 304.0494134243.

The spelling of 28108166 in words is "twenty-eight million, one hundred eight thousand, one hundred sixty-six".