4220724 has 12 divisors (see below), whose sum is σ = 9848384. Its totient is φ = 1406904.

The previous prime is 4220719. The next prime is 4220729. The reversal of 4220724 is 4270224.

It is an interprime number because it is at equal distance from previous prime (4220719) and next prime (4220729).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×4220724² = 35629022168352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4220724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220729) 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, 175852 + ... + 175875.

Almost surely, 2^4220724 is an apocalyptic number.

It is an amenable number.

4220724 is an abundant number, since it is smaller than the sum of its proper divisors (5627660).

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

4220724 is a wasteful number, since it uses less digits than its factorization.

4220724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351734 (or 351732 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 4220724 is about 2054.4400697027. The cubic root of 4220724 is about 161.6077999209.

Adding to 4220724 its reverse (4270224), we get a palindrome (8490948).

The spelling of 4220724 in words is "four million, two hundred twenty thousand, seven hundred twenty-four".