4218220 has 12 divisors (see below), whose sum is σ = 8858304. Its totient is φ = 1687280.

The previous prime is 4218199. The next prime is 4218241. The reversal of 4218220 is 228124.

It is an interprime number because it is at equal distance from previous prime (4218199) and next prime (4218241).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105436 + ... + 105475.

It is an arithmetic number, because the mean of its divisors is an integer number (738192).

Almost surely, 2^4218220 is an apocalyptic number.

It is an amenable number.

4218220 is an abundant number, since it is smaller than the sum of its proper divisors (4640084).

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

4218220 is a wasteful number, since it uses less digits than its factorization.

4218220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210920 (or 210918 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 4218220 is about 2053.8305675006. The cubic root of 4218220 is about 161.5758349482.

The spelling of 4218220 in words is "four million, two hundred eighteen thousand, two hundred twenty".