4085940839 has 4 divisors (see below), whose sum is σ = 4086076656. Its totient is φ = 4085805024.

The previous prime is 4085940829. The next prime is 4085940851. The reversal of 4085940839 is 9380495804.

It is a happy number.

4085940839 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4085940839 - 2¹⁶ = 4085875303 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 (4085940809) 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, 434 + ... + 90399.

It is an arithmetic number, because the mean of its divisors is an integer number (1021519164).

Almost surely, 2^4085940839 is an apocalyptic number.

4085940839 is a deficient number, since it is larger than the sum of its proper divisors (135817).

4085940839 is an equidigital number, since it uses as much as digits as its factorization.

4085940839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135816.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 4085940839 is about 63921.3644957615. The cubic root of 4085940839 is about 1598.6891397331.

The spelling of 4085940839 in words is "four billion, eighty-five million, nine hundred forty thousand, eight hundred thirty-nine".