28110223 has 4 divisors (see below), whose sum is σ = 28131048. Its totient is φ = 28089400.

The previous prime is 28110221. The next prime is 28110227. The reversal of 28110223 is 32201182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28110223 - 2¹ = 28110221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28110223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28110221) 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, 8236 + ... + 11137.

It is an arithmetic number, because the mean of its divisors is an integer number (7032762).

Almost surely, 2^28110223 is an apocalyptic number.

28110223 is a deficient number, since it is larger than the sum of its proper divisors (20825).

28110223 is a wasteful number, since it uses less digits than its factorization.

28110223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20824.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 28110223 is about 5301.9074869334. The cubic root of 28110223 is about 304.0568301822.

The spelling of 28110223 in words is "twenty-eight million, one hundred ten thousand, two hundred twenty-three".