4372218 has 40 divisors (see below), whose sum is σ = 9918612. Its totient is φ = 1439424.

The previous prime is 4372211. The next prime is 4372237. The reversal of 4372218 is 8122734.

4372218 is a `hidden beast` number, since 437 + 221 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3814209 + 558009 = 1953^2 + 747^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 4372191 and 4372200.

It is not an unprimeable number, because it can be changed into a prime (4372211) 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 19 ways as a sum of consecutive naturals, for example, 22096 + ... + 22292.

Almost surely, 2^4372218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4372218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4959306).

4372218 is an abundant number, since it is smaller than the sum of its proper divisors (5546394).

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

4372218 is a wasteful number, since it uses less digits than its factorization.

4372218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 339 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 4372218 is about 2090.9849353833. The cubic root of 4372218 is about 163.5186410864.

The spelling of 4372218 in words is "four million, three hundred seventy-two thousand, two hundred eighteen".