28227247 has 2 divisors, whose sum is σ = 28227248. Its totient is φ = 28227246.

The previous prime is 28227239. The next prime is 28227271. The reversal of 28227247 is 74272282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28227247 - 2³ = 28227239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28227347) 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 as a sum of consecutive naturals, namely, 14113623 + 14113624.

It is an arithmetic number, because the mean of its divisors is an integer number (14113624).

Almost surely, 2^28227247 is an apocalyptic number.

28227247 is a deficient number, since it is larger than the sum of its proper divisors (1).

28227247 is an equidigital number, since it uses as much as digits as its factorization.

28227247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 34.

The square root of 28227247 is about 5312.9320530193. The cubic root of 28227247 is about 304.4781796679.

The spelling of 28227247 in words is "twenty-eight million, two hundred twenty-seven thousand, two hundred forty-seven".