4278609 has 16 divisors (see below), whose sum is σ = 6402240. Its totient is φ = 2823840.

The previous prime is 4278607. The next prime is 4278613. The reversal of 4278609 is 9068724.

4278609 is a `hidden beast` number, since 42 + 7 + 8 + 609 = 666.

It is not a de Polignac number, because 4278609 - 2¹ = 4278607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4278607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2149 + ... + 3629.

It is an arithmetic number, because the mean of its divisors is an integer number (400140).

Almost surely, 2^4278609 is an apocalyptic number.

It is an amenable number.

4278609 is a deficient number, since it is larger than the sum of its proper divisors (2123631).

4278609 is a wasteful number, since it uses less digits than its factorization.

4278609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 4278609 is about 2068.4798766244. The cubic root of 4278609 is about 162.3432365905.

The spelling of 4278609 in words is "four million, two hundred seventy-eight thousand, six hundred nine".