4381220 has 24 divisors (see below), whose sum is σ = 9240000. Its totient is φ = 1744992.

The previous prime is 4381187. The next prime is 4381249. The reversal of 4381220 is 221834.

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 = 4381192 and 4381201.

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, 8531 + ... + 9029.

It is an arithmetic number, because the mean of its divisors is an integer number (385000).

Almost surely, 2^4381220 is an apocalyptic number.

It is an amenable number.

4381220 is an abundant number, since it is smaller than the sum of its proper divisors (4858780).

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

4381220 is a wasteful number, since it uses less digits than its factorization.

4381220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 945 counting only the distinct ones).

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

The square root of 4381220 is about 2093.1364026265. The cubic root of 4381220 is about 163.6307875017.

The spelling of 4381220 in words is "four million, three hundred eighty-one thousand, two hundred twenty".