5278809 has 16 divisors (see below), whose sum is σ = 7276544. Its totient is φ = 3402000.

The previous prime is 5278787. The next prime is 5278813. The reversal of 5278809 is 9088725.

It is not a de Polignac number, because 5278809 - 2⁷ = 5278681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5278829) 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, 19344 + ... + 19614.

It is an arithmetic number, because the mean of its divisors is an integer number (454784).

Almost surely, 2^5278809 is an apocalyptic number.

It is an amenable number.

5278809 is a deficient number, since it is larger than the sum of its proper divisors (1997735).

5278809 is a wasteful number, since it uses less digits than its factorization.

5278809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 5278809 is about 2297.5658858888. The cubic root of 5278809 is about 174.1186599779.

The spelling of 5278809 in words is "five million, two hundred seventy-eight thousand, eight hundred nine".