4421720 has 16 divisors (see below), whose sum is σ = 9948960. Its totient is φ = 1768672.

The previous prime is 4421719. The next prime is 4421723. The reversal of 4421720 is 271244.

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 = 4421692 and 4421701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55232 + ... + 55311.

It is an arithmetic number, because the mean of its divisors is an integer number (621810).

Almost surely, 2^4421720 is an apocalyptic number.

4421720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4421720 is an abundant number, since it is smaller than the sum of its proper divisors (5527240).

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

4421720 is a wasteful number, since it uses less digits than its factorization.

4421720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110554 (or 110550 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 4421720 is about 2102.7886246601. The cubic root of 4421720 is about 164.1334428488.

Adding to 4421720 its reverse (271244), we get a palindrome (4692964).

The spelling of 4421720 in words is "four million, four hundred twenty-one thousand, seven hundred twenty".