3858646839 has 16 divisors (see below), whose sum is σ = 5277148800. Its totient is φ = 2506575456.

The previous prime is 3858646783. The next prime is 3858646867. The reversal of 3858646839 is 9386468583.

It is a happy number.

It is not a de Polignac number, because 3858646839 - 2⁹ = 3858646327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3858646889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18357 + ... + 89745.

It is an arithmetic number, because the mean of its divisors is an integer number (329821800).

Almost surely, 2^3858646839 is an apocalyptic number.

3858646839 is a deficient number, since it is larger than the sum of its proper divisors (1418501961).

3858646839 is a wasteful number, since it uses less digits than its factorization.

3858646839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71854.

The product of its digits is 29859840, while the sum is 60.

The square root of 3858646839 is about 62118.0073650145. The cubic root of 3858646839 is about 1568.4776836589.

The spelling of 3858646839 in words is "three billion, eight hundred fifty-eight million, six hundred forty-six thousand, eight hundred thirty-nine".