28663227 has 10 divisors (see below), whose sum is σ = 42818028. Its totient is φ = 19108764.

The previous prime is 28663213. The next prime is 28663237. The reversal of 28663227 is 72236682.

It is not a de Polignac number, because 28663227 - 2⁶ = 28663163 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28663191 and 28663200.

It is not an unprimeable number, because it can be changed into a prime (28663237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 176853 + ... + 177014.

Almost surely, 2^28663227 is an apocalyptic number.

28663227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28663227 is a deficient number, since it is larger than the sum of its proper divisors (14154801).

28663227 is an equidigital number, since it uses as much as digits as its factorization.

28663227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353879 (or 353870 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 28663227 is about 5353.8049086608. The cubic root of 28663227 is about 306.0377692711.

The spelling of 28663227 in words is "twenty-eight million, six hundred sixty-three thousand, two hundred twenty-seven".