28194186 has 16 divisors (see below), whose sum is σ = 56447424. Its totient is φ = 9388224.

The previous prime is 28194181. The next prime is 28194193. The reversal of 28194186 is 68149182.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28194181) 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, 5971 + ... + 9593.

It is an arithmetic number, because the mean of its divisors is an integer number (3527964).

Almost surely, 2^28194186 is an apocalyptic number.

28194186 is an abundant number, since it is smaller than the sum of its proper divisors (28253238).

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

28194186 is a wasteful number, since it uses less digits than its factorization.

28194186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4925.

The product of its digits is 27648, while the sum is 39.

The square root of 28194186 is about 5309.8197709527. The cubic root of 28194186 is about 304.3592604583.

The spelling of 28194186 in words is "twenty-eight million, one hundred ninety-four thousand, one hundred eighty-six".