4385993821 has 16 divisors (see below), whose sum is σ = 4804257600. Its totient is φ = 3971030400.

The previous prime is 4385993791. The next prime is 4385993837. The reversal of 4385993821 is 1283995834.

It is a cyclic number.

It is not a de Polignac number, because 4385993821 - 2⁹ = 4385993309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4385993881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5763081 + ... + 5763841.

It is an arithmetic number, because the mean of its divisors is an integer number (300266100).

Almost surely, 2^4385993821 is an apocalyptic number.

It is an amenable number.

4385993821 is a deficient number, since it is larger than the sum of its proper divisors (418263779).

4385993821 is a wasteful number, since it uses less digits than its factorization.

4385993821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220.

The product of its digits is 1866240, while the sum is 52.

The square root of 4385993821 is about 66226.8361089370. The cubic root of 4385993821 is about 1636.9019717506.

The spelling of 4385993821 in words is "four billion, three hundred eighty-five million, nine hundred ninety-three thousand, eight hundred twenty-one".