28168386 has 16 divisors (see below), whose sum is σ = 56451168. Its totient is φ = 9370400.

The previous prime is 28168381. The next prime is 28168421. The reversal of 28168386 is 68386182.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28168381) 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, 1380 + ... + 7631.

It is an arithmetic number, because the mean of its divisors is an integer number (3528198).

Almost surely, 2^28168386 is an apocalyptic number.

28168386 is an abundant number, since it is smaller than the sum of its proper divisors (28282782).

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

28168386 is a wasteful number, since it uses less digits than its factorization.

28168386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9537.

The product of its digits is 110592, while the sum is 42.

The square root of 28168386 is about 5307.3897539186. The cubic root of 28168386 is about 304.2663942038.

The spelling of 28168386 in words is "twenty-eight million, one hundred sixty-eight thousand, three hundred eighty-six".