5185809 has 32 divisors (see below), whose sum is σ = 8208000. Its totient is φ = 3229632.

The previous prime is 5185801. The next prime is 5185811. The reversal of 5185809 is 9085815.

It is not a de Polignac number, because 5185809 - 2³ = 5185801 is a prime.

It is a super-2 number, since 2×5185809² = 53785229968962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5185801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28882 + ... + 29060.

It is an arithmetic number, because the mean of its divisors is an integer number (256500).

Almost surely, 2^5185809 is an apocalyptic number.

It is an amenable number.

5185809 is a deficient number, since it is larger than the sum of its proper divisors (3022191).

5185809 is a wasteful number, since it uses less digits than its factorization.

5185809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 5185809 is about 2277.2371418014. The cubic root of 5185809 is about 173.0900774959.

The spelling of 5185809 in words is "five million, one hundred eighty-five thousand, eight hundred nine".