28168066 has 16 divisors (see below), whose sum is σ = 43477560. Its totient is φ = 13678720.

The previous prime is 28168061. The next prime is 28168067. The reversal of 28168066 is 66086182.

It can be written as a sum of positive squares in 4 ways, for example, as 12047841 + 16120225 = 3471^2 + 4015^2 .

It is not an unprimeable number, because it can be changed into a prime (28168061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21420 + ... + 22696.

Almost surely, 2^28168066 is an apocalyptic number.

28168066 is a deficient number, since it is larger than the sum of its proper divisors (15309494).

28168066 is a wasteful number, since it uses less digits than its factorization.

28168066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 28168066 is about 5307.3596071870. The cubic root of 28168066 is about 304.2652420184.

The spelling of 28168066 in words is "twenty-eight million, one hundred sixty-eight thousand, sixty-six".