4428643 has 2 divisors, whose sum is σ = 4428644. Its totient is φ = 4428642.

The previous prime is 4428607. The next prime is 4428689. The reversal of 4428643 is 3468244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4428643 - 2¹⁷ = 4297571 is a prime.

It is a super-2 number, since 2×4428643² = 39225757642898, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4⁴ + 4⁷ + 2¹⁵ + 8 + 6⁵ + 4¹¹ + 3¹¹ .

It is not a weakly prime, because it can be changed into another prime (4428043) 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, 2214321 + 2214322.

It is an arithmetic number, because the mean of its divisors is an integer number (2214322).

Almost surely, 2^4428643 is an apocalyptic number.

4428643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4428643 is an equidigital number, since it uses as much as digits as its factorization.

4428643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 31.

The square root of 4428643 is about 2104.4341282159. The cubic root of 4428643 is about 164.2190583494.

The spelling of 4428643 in words is "four million, four hundred twenty-eight thousand, six hundred forty-three".