3868778685 has 16 divisors (see below), whose sum is σ = 6194770560. Its totient is φ = 2061773760.

The previous prime is 3868778659. The next prime is 3868778699. The reversal of 3868778685 is 5868778683.

It is not a de Polignac number, because 3868778685 - 2¹² = 3868774589 is a prime.

It is a super-3 number, since 3×3868778685³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 77986 + ... + 117555.

It is an arithmetic number, because the mean of its divisors is an integer number (387173160).

Almost surely, 2^3868778685 is an apocalyptic number.

It is an amenable number.

3868778685 is a deficient number, since it is larger than the sum of its proper divisors (2325991875).

3868778685 is a wasteful number, since it uses less digits than its factorization.

3868778685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196868.

The product of its digits is 108380160, while the sum is 66.

The square root of 3868778685 is about 62199.5071121950. The cubic root of 3868778685 is about 1569.8492944987.

The spelling of 3868778685 in words is "three billion, eight hundred sixty-eight million, seven hundred seventy-eight thousand, six hundred eighty-five".