28117166 has 16 divisors (see below), whose sum is σ = 52583040. Its totient is φ = 10954680.

The previous prime is 28117129. The next prime is 28117181. The reversal of 28117166 is 66171182.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91136 + ... + 91443.

It is an arithmetic number, because the mean of its divisors is an integer number (3286440).

Almost surely, 2^28117166 is an apocalyptic number.

28117166 is a deficient number, since it is larger than the sum of its proper divisors (24465874).

28117166 is a wasteful number, since it uses less digits than its factorization.

28117166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182599.

The product of its digits is 4032, while the sum is 32.

The square root of 28117166 is about 5302.5622108562. The cubic root of 28117166 is about 304.0818613223.

The spelling of 28117166 in words is "twenty-eight million, one hundred seventeen thousand, one hundred sixty-six".