28609227 has 16 divisors (see below), whose sum is σ = 42763680. Its totient is φ = 18902016.

The previous prime is 28609213. The next prime is 28609247. The reversal of 28609227 is 72290682.

28609227 is a `hidden beast` number, since 28 + 609 + 2 + 27 = 666.

It is not a de Polignac number, because 28609227 - 2¹⁴ = 28592843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28609191 and 28609200.

It is not an unprimeable number, because it can be changed into a prime (28609247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1638 + ... + 7739.

It is an arithmetic number, because the mean of its divisors is an integer number (2672730).

Almost surely, 2^28609227 is an apocalyptic number.

28609227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28609227 is a deficient number, since it is larger than the sum of its proper divisors (14154453).

28609227 is a wasteful number, since it uses less digits than its factorization.

28609227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9499 (or 9493 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28609227 is about 5348.7593888677. The cubic root of 28609227 is about 305.8454621444.

The spelling of 28609227 in words is "twenty-eight million, six hundred nine thousand, two hundred twenty-seven".