4220289 has 8 divisors (see below), whose sum is σ = 6252320. Its totient is φ = 2813508.

The previous prime is 4220287. The next prime is 4220297. The reversal of 4220289 is 9820224.

It is not a de Polignac number, because 4220289 - 2¹ = 4220287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 156307 = 4220289 / (4 + 2 + 2 + 0 + 2 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4220287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78127 + ... + 78180.

It is an arithmetic number, because the mean of its divisors is an integer number (781540).

Almost surely, 2^4220289 is an apocalyptic number.

It is an amenable number.

4220289 is a deficient number, since it is larger than the sum of its proper divisors (2032031).

4220289 is a wasteful number, since it uses less digits than its factorization.

4220289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156316 (or 156310 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 4220289 is about 2054.3341987126. The cubic root of 4220289 is about 161.6022478080.

The spelling of 4220289 in words is "four million, two hundred twenty thousand, two hundred eighty-nine".