4321440538 has 4 divisors (see below), whose sum is σ = 6482160810. Its totient is φ = 2160720268.

The previous prime is 4321440509. The next prime is 4321440577. The reversal of 4321440538 is 8350441234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8350441234 = 2 ⋅4175220617.

It can be written as a sum of positive squares in only one way, i.e., 2532404329 + 1789036209 = 50323^2 + 42297^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080360133 + ... + 1080360136.

Almost surely, 2^4321440538 is an apocalyptic number.

4321440538 is a deficient number, since it is larger than the sum of its proper divisors (2160720272).

4321440538 is a wasteful number, since it uses less digits than its factorization.

4321440538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160720271.

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 4321440538 is about 65737.6645310738. The cubic root of 4321440538 is about 1628.8315786224.

The spelling of 4321440538 in words is "four billion, three hundred twenty-one million, four hundred forty thousand, five hundred thirty-eight".