8428609 has 16 divisors (see below), whose sum is σ = 10240000. Its totient is φ = 6776784.

The previous prime is 8428601. The next prime is 8428613. The reversal of 8428609 is 9068248.

It is not a de Polignac number, because 8428609 - 2³ = 8428601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8428601) 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 15 ways as a sum of consecutive naturals, for example, 16642 + ... + 17140.

It is an arithmetic number, because the mean of its divisors is an integer number (640000).

Almost surely, 2^8428609 is an apocalyptic number.

It is an amenable number.

8428609 is a deficient number, since it is larger than the sum of its proper divisors (1811391).

8428609 is a wasteful number, since it uses less digits than its factorization.

8428609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 8428609 is about 2903.2066753850. The cubic root of 8428609 is about 203.5097882994.

The spelling of 8428609 in words is "eight million, four hundred twenty-eight thousand, six hundred nine".