40228289 has 2 divisors, whose sum is σ = 40228290. Its totient is φ = 40228288.

The previous prime is 40228283. The next prime is 40228319. The reversal of 40228289 is 98282204.

40228289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32433025 + 7795264 = 5695^2 + 2792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40228289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40228283) 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 as a sum of consecutive naturals, namely, 20114144 + 20114145.

It is an arithmetic number, because the mean of its divisors is an integer number (20114145).

Almost surely, 2^40228289 is an apocalyptic number.

It is an amenable number.

40228289 is a deficient number, since it is larger than the sum of its proper divisors (1).

40228289 is an equidigital number, since it uses as much as digits as its factorization.

40228289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 40228289 is about 6342.5774729206. The cubic root of 40228289 is about 342.6445700086.

The spelling of 40228289 in words is "forty million, two hundred twenty-eight thousand, two hundred eighty-nine".