4643728 has 10 divisors (see below), whose sum is σ = 8997254. Its totient is φ = 2321856.

The previous prime is 4643719. The next prime is 4643729. The reversal of 4643728 is 8273464.

It can be written as a sum of positive squares in only one way, i.e., 4460544 + 183184 = 2112^2 + 428^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4643693 and 4643702.

It is not an unprimeable number, because it can be changed into a prime (4643729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145101 + ... + 145132.

Almost surely, 2^4643728 is an apocalyptic number.

It is an amenable number.

4643728 is a deficient number, since it is larger than the sum of its proper divisors (4353526).

4643728 is a wasteful number, since it uses less digits than its factorization.

4643728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290241 (or 290235 counting only the distinct ones).

The product of its digits is 32256, while the sum is 34.

The square root of 4643728 is about 2154.9310893855. The cubic root of 4643728 is about 166.8356756689.

The spelling of 4643728 in words is "four million, six hundred forty-three thousand, seven hundred twenty-eight".