28163858 has 8 divisors (see below), whose sum is σ = 42446640. Its totient is φ = 14014980.

The previous prime is 28163851. The next prime is 28163867. The reversal of 28163858 is 85836182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28163851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32948 + ... + 33791.

It is an arithmetic number, because the mean of its divisors is an integer number (5305830).

Almost surely, 2^28163858 is an apocalyptic number.

28163858 is a deficient number, since it is larger than the sum of its proper divisors (14282782).

28163858 is a wasteful number, since it uses less digits than its factorization.

28163858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66952.

The product of its digits is 92160, while the sum is 41.

The square root of 28163858 is about 5306.9631617338. The cubic root of 28163858 is about 304.2500899676.

The spelling of 28163858 in words is "twenty-eight million, one hundred sixty-three thousand, eight hundred fifty-eight".