4243728 has 20 divisors (see below), whose sum is σ = 10963088. Its totient is φ = 1414560.

The previous prime is 4243721. The next prime is 4243747. The reversal of 4243728 is 8273424.

It is a d-powerful number, because it can be written as 4⁴ + 2²¹ + 4⁷ + 3² + 7 + 2²¹ + 8⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 4243695 and 4243704.

It is not an unprimeable number, because it can be changed into a prime (4243721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44158 + ... + 44253.

Almost surely, 2^4243728 is an apocalyptic number.

4243728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

4243728 is an abundant number, since it is smaller than the sum of its proper divisors (6719360).

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

4243728 is a wasteful number, since it uses less digits than its factorization.

4243728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88422 (or 88416 counting only the distinct ones).

The product of its digits is 10752, while the sum is 30.

The square root of 4243728 is about 2060.0310677269. The cubic root of 4243728 is about 161.9008690886.

The spelling of 4243728 in words is "four million, two hundred forty-three thousand, seven hundred twenty-eight".