4218320 has 40 divisors (see below), whose sum is σ = 9966624. Its totient is φ = 1660032.

The previous prime is 4218317. The next prime is 4218349. The reversal of 4218320 is 238124.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 4218292 and 4218301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4967 + ... + 5753.

Almost surely, 2^4218320 is an apocalyptic number.

4218320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4218320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4983312).

4218320 is an abundant number, since it is smaller than the sum of its proper divisors (5748304).

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

4218320 is a wasteful number, since it uses less digits than its factorization.

4218320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 4218320 is about 2053.8549121104. The cubic root of 4218320 is about 161.5771117471.

The spelling of 4218320 in words is "four million, two hundred eighteen thousand, three hundred twenty".