4428643217 has 4 divisors (see below), whose sum is σ = 4431350196. Its totient is φ = 4425936240.

The previous prime is 4428643207. The next prime is 4428643267. The reversal of 4428643217 is 7123468244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1470262336 + 2958380881 = 38344^2 + 54391^2 .

It is a cyclic number.

It is not a de Polignac number, because 4428643217 - 2¹⁰ = 4428642193 is a prime.

It is a super-2 number, since 2×4428643217² = 39225761486960218178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4428643207) 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, 1351034 + ... + 1354307.

It is an arithmetic number, because the mean of its divisors is an integer number (1107837549).

Almost surely, 2^4428643217 is an apocalyptic number.

It is an amenable number.

4428643217 is a deficient number, since it is larger than the sum of its proper divisors (2706979).

4428643217 is a wasteful number, since it uses less digits than its factorization.

4428643217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706978.

The product of its digits is 258048, while the sum is 41.

The square root of 4428643217 is about 66548.0519399328. The cubic root of 4428643217 is about 1642.1906103165.

The spelling of 4428643217 in words is "four billion, four hundred twenty-eight million, six hundred forty-three thousand, two hundred seventeen".