28223163 has 12 divisors (see below), whose sum is σ = 40833520. Its totient is φ = 18784656.

The previous prime is 28223161. The next prime is 28223183. The reversal of 28223163 is 36132282.

It is not a de Polignac number, because 28223163 - 2¹ = 28223161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28223161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4170 + ... + 8592.

Almost surely, 2^28223163 is an apocalyptic number.

28223163 is a deficient number, since it is larger than the sum of its proper divisors (12610357).

28223163 is a wasteful number, since it uses less digits than its factorization.

28223163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138 (or 5135 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 28223163 is about 5312.5476939036. The cubic root of 28223163 is about 304.4634946975.

The spelling of 28223163 in words is "twenty-eight million, two hundred twenty-three thousand, one hundred sixty-three".