5809818 has 64 divisors (see below), whose sum is σ = 14376960. Its totient is φ = 1527552.

The previous prime is 5809757. The next prime is 5809829. The reversal of 5809818 is 8189085.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56355 + ... + 56457.

It is an arithmetic number, because the mean of its divisors is an integer number (224640).

Almost surely, 2^5809818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5809818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7188480).

5809818 is an abundant number, since it is smaller than the sum of its proper divisors (8567142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5809818 is a wasteful number, since it uses less digits than its factorization.

5809818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211.

The product of its (nonzero) digits is 23040, while the sum is 39.

The square root of 5809818 is about 2410.3564051816. The cubic root of 5809818 is about 179.7715001786.

The spelling of 5809818 in words is "five million, eight hundred nine thousand, eight hundred eighteen".