4243599938 has 18 divisors (see below), whose sum is σ = 6464035737. Its totient is φ = 2089417680.

The previous prime is 4243599937. The next prime is 4243599949. The reversal of 4243599938 is 8399953424.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4224090049 + 19509889 = 64993^2 + 4417^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=46063.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4243599937) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6724883 + ... + 6725513.

Almost surely, 2^4243599938 is an apocalyptic number.

4243599938 is a deficient number, since it is larger than the sum of its proper divisors (2220435799).

4243599938 is an frugal number, since it uses more digits than its factorization.

4243599938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410 (or 706 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 56.

The square root of 4243599938 is about 65142.9193235919. The cubic root of 4243599938 is about 1618.9924052382.

The spelling of 4243599938 in words is "four billion, two hundred forty-three million, five hundred ninety-nine thousand, nine hundred thirty-eight".