4878809 has 16 divisors (see below), whose sum is σ = 5482512. Its totient is φ = 4313088.

The previous prime is 4878799. The next prime is 4878817. The reversal of 4878809 is 9088784.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 25600 + 4853209 = 160^2 + 2203^2 .

It is not a de Polignac number, because 4878809 - 2⁴ = 4878793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4878809.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4878869) 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, 50249 + ... + 50345.

It is an arithmetic number, because the mean of its divisors is an integer number (342657).

Almost surely, 2^4878809 is an apocalyptic number.

It is an amenable number.

4878809 is a deficient number, since it is larger than the sum of its proper divisors (603703).

4878809 is a wasteful number, since it uses less digits than its factorization.

4878809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 4878809 is about 2208.8026168040. The cubic root of 4878809 is about 169.6047217632.

The spelling of 4878809 in words is "four million, eight hundred seventy-eight thousand, eight hundred nine".