5509818 has 24 divisors (see below), whose sum is σ = 12262068. Its totient is φ = 1786752.

The previous prime is 5509783. The next prime is 5509859. The reversal of 5509818 is 8189055.

5509818 is a `hidden beast` number, since 550 + 98 + 18 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4809249 + 700569 = 2193^2 + 837^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3471 + ... + 4802.

Almost surely, 2^5509818 is an apocalyptic number.

5509818 is an abundant number, since it is smaller than the sum of its proper divisors (6752250).

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

5509818 is a wasteful number, since it uses less digits than its factorization.

5509818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8318 (or 8315 counting only the distinct ones).

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

The square root of 5509818 is about 2347.3001512376. The cubic root of 5509818 is about 176.6223875423.

The spelling of 5509818 in words is "five million, five hundred nine thousand, eight hundred eighteen".