4028609 has 8 divisors (see below), whose sum is σ = 4593960. Its totient is φ = 3499776.

The previous prime is 4028603. The next prime is 4028621. The reversal of 4028609 is 9068204.

It can be written as a sum of positive squares in 4 ways, for example, as 1763584 + 2265025 = 1328^2 + 1505^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4028609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4028603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8894 + ... + 9335.

It is an arithmetic number, because the mean of its divisors is an integer number (574245).

Almost surely, 2^4028609 is an apocalyptic number.

It is an amenable number.

4028609 is a deficient number, since it is larger than the sum of its proper divisors (565351).

4028609 is a wasteful number, since it uses less digits than its factorization.

4028609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18259.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 4028609 is about 2007.1395068604. The cubic root of 4028609 is about 159.1176561486.

The spelling of 4028609 in words is "four million, twenty-eight thousand, six hundred nine".