4228720 has 20 divisors (see below), whose sum is σ = 9831960. Its totient is φ = 1691456.

The previous prime is 4228673. The next prime is 4228723. The reversal of 4228720 is 278224.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4228723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26350 + ... + 26509.

It is an arithmetic number, because the mean of its divisors is an integer number (491598).

Almost surely, 2^4228720 is an apocalyptic number.

4228720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4228720 is an abundant number, since it is smaller than the sum of its proper divisors (5603240).

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

4228720 is a wasteful number, since it uses less digits than its factorization.

4228720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52872 (or 52866 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 4228720 is about 2056.3851779275. The cubic root of 4228720 is about 161.7097888062.

The spelling of 4228720 in words is "four million, two hundred twenty-eight thousand, seven hundred twenty".