4042445789 has 4 divisors (see below), whose sum is σ = 4052048220. Its totient is φ = 4032843360.

The previous prime is 4042445779. The next prime is 4042445801. The reversal of 4042445789 is 9875442404.

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 649383289 + 3393062500 = 25483^2 + 58250^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042445789 - 2¹² = 4042441693 is a prime.

It is a super-4 number, since 4×4042445789⁴ (a number of 40 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042445779) 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, 4800584 + ... + 4801425.

It is an arithmetic number, because the mean of its divisors is an integer number (1013012055).

Almost surely, 2^4042445789 is an apocalyptic number.

It is an amenable number.

4042445789 is a deficient number, since it is larger than the sum of its proper divisors (9602431).

4042445789 is an equidigital number, since it uses as much as digits as its factorization.

4042445789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9602430.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The square root of 4042445789 is about 63580.2311178561. The cubic root of 4042445789 is about 1592.9961817586.

The spelling of 4042445789 in words is "four billion, forty-two million, four hundred forty-five thousand, seven hundred eighty-nine".