2478609 has 12 divisors (see below), whose sum is σ = 4091776. Its totient is φ = 1416312.

The previous prime is 2478589. The next prime is 2478611. The reversal of 2478609 is 9068742.

2478609 is a `hidden beast` number, since 2 + 47 + 8 + 609 = 666.

It is not a de Polignac number, because 2478609 - 2⁹ = 2478097 is a prime.

It is a super-2 number, since 2×2478609² = 12287005149762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2478709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19609 + ... + 19734.

2^2478609 is an apocalyptic number.

It is an amenable number.

2478609 is a deficient number, since it is larger than the sum of its proper divisors (1613167).

2478609 is a wasteful number, since it uses less digits than its factorization.

2478609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39356 (or 39353 counting only the distinct ones).

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

The square root of 2478609 is about 1574.3598699154. The cubic root of 2478609 is about 135.3326774594.

The spelling of 2478609 in words is "two million, four hundred seventy-eight thousand, six hundred nine".