5623218 has 12 divisors (see below), whose sum is σ = 12183678. Its totient is φ = 1874400.

The previous prime is 5623217. The next prime is 5623229. The reversal of 5623218 is 8123265.

It can be written as a sum of positive squares in only one way, i.e., 4028049 + 1595169 = 2007^2 + 1263^2 .

It is a super-4 number, since 4×5623218⁴ (a number of 28 digits) contains 4444 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5623191 and 5623200.

It is not an unprimeable number, because it can be changed into a prime (5623213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156183 + ... + 156218.

Almost surely, 2^5623218 is an apocalyptic number.

5623218 is an abundant number, since it is smaller than the sum of its proper divisors (6560460).

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

5623218 is a wasteful number, since it uses less digits than its factorization.

5623218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312409 (or 312406 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 5623218 is about 2371.3325367818. The cubic root of 5623218 is about 177.8258828443.

The spelling of 5623218 in words is "five million, six hundred twenty-three thousand, two hundred eighteen".