28203227 has 12 divisors (see below), whose sum is σ = 31257864. Its totient is φ = 25421760.

The previous prime is 28203209. The next prime is 28203233. The reversal of 28203227 is 72230282.

It is not a de Polignac number, because 28203227 - 2¹⁰ = 28202203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28203196 and 28203205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28203247) 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, 5327 + ... + 9207.

It is an arithmetic number, because the mean of its divisors is an integer number (2604822).

Almost surely, 2^28203227 is an apocalyptic number.

28203227 is a deficient number, since it is larger than the sum of its proper divisors (3054637).

28203227 is a wasteful number, since it uses less digits than its factorization.

28203227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950 (or 3937 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 28203227 is about 5310.6710498768. The cubic root of 28203227 is about 304.3917898363.

The spelling of 28203227 in words is "twenty-eight million, two hundred three thousand, two hundred twenty-seven".