4428933561 has 12 divisors (see below), whose sum is σ = 6889452388. Its totient is φ = 2725497504.

The previous prime is 4428933547. The next prime is 4428933569. The reversal of 4428933561 is 1653398244.

4428933561 is a `hidden beast` number, since 4 + 4 + 2 + 89 + 3 + 3 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1553936400 + 2874997161 = 39420^2 + 53619^2 .

It is not a de Polignac number, because 4428933561 - 2¹⁴ = 4428917177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4428933569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18926950 + ... + 18927183.

Almost surely, 2^4428933561 is an apocalyptic number.

It is an amenable number.

4428933561 is a deficient number, since it is larger than the sum of its proper divisors (2460518827).

4428933561 is a wasteful number, since it uses less digits than its factorization.

4428933561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37854152 (or 37854149 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 4428933561 is about 66550.2333654811. The cubic root of 4428933561 is about 1642.2264971369.

The spelling of 4428933561 in words is "four billion, four hundred twenty-eight million, nine hundred thirty-three thousand, five hundred sixty-one".