3899138786 has 16 divisors (see below), whose sum is σ = 6013502208. Its totient is φ = 1894989600.

The previous prime is 3899138783. The next prime is 3899138791. The reversal of 3899138786 is 6878319983.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3899138783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65510 + ... + 109953.

It is an arithmetic number, because the mean of its divisors is an integer number (375843888).

Almost surely, 2^3899138786 is an apocalyptic number.

3899138786 is a deficient number, since it is larger than the sum of its proper divisors (2114363422).

3899138786 is a wasteful number, since it uses less digits than its factorization.

3899138786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175777.

The product of its digits is 15676416, while the sum is 62.

The square root of 3899138786 is about 62443.0843728911. The cubic root of 3899138786 is about 1573.9450445721.

It can be divided in two parts, 38991 and 38786, that added together give a palindrome (77777).

The spelling of 3899138786 in words is "three billion, eight hundred ninety-nine million, one hundred thirty-eight thousand, seven hundred eighty-six".