4228909 has 4 divisors (see below), whose sum is σ = 4272604. Its totient is φ = 4185216.

The previous prime is 4228907. The next prime is 4228951. The reversal of 4228909 is 9098224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 675684 + 3553225 = 822^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 4228909 - 2¹ = 4228907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4228901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21702 + ... + 21895.

It is an arithmetic number, because the mean of its divisors is an integer number (1068151).

Almost surely, 2^4228909 is an apocalyptic number.

It is an amenable number.

4228909 is a deficient number, since it is larger than the sum of its proper divisors (43695).

4228909 is an equidigital number, since it uses as much as digits as its factorization.

4228909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43694.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 4228909 is about 2056.4311318398. The cubic root of 4228909 is about 161.7121979430.

The spelling of 4228909 in words is "four million, two hundred twenty-eight thousand, nine hundred nine".