4223720 has 32 divisors (see below), whose sum is σ = 9918720. Its totient is φ = 1615680.

The previous prime is 4223717. The next prime is 4223741. The reversal of 4223720 is 273224.

It is a happy number.

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 = 4223692 and 4223701.

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, 1376 + ... + 3215.

It is an arithmetic number, because the mean of its divisors is an integer number (309960).

Almost surely, 2^4223720 is an apocalyptic number.

4223720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4223720 is an abundant number, since it is smaller than the sum of its proper divisors (5695000).

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

4223720 is a wasteful number, since it uses less digits than its factorization.

4223720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625 (or 4621 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 4223720 is about 2055.1690927999. The cubic root of 4223720 is about 161.6460289429.

Adding to 4223720 its reverse (273224), we get a palindrome (4496944).

The spelling of 4223720 in words is "four million, two hundred twenty-three thousand, seven hundred twenty".