3868636872 has 16 divisors (see below), whose sum is σ = 9671592240. Its totient is φ = 1289545616.

The previous prime is 3868636867. The next prime is 3868636879. The reversal of 3868636872 is 2786368683.

It is not an unprimeable number, because it can be changed into a prime (3868636879) 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 3 ways as a sum of consecutive naturals, for example, 80596578 + ... + 80596625.

It is an arithmetic number, because the mean of its divisors is an integer number (604474515).

Almost surely, 2^3868636872 is an apocalyptic number.

It is an amenable number.

3868636872 is an abundant number, since it is smaller than the sum of its proper divisors (5802955368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3868636872 is a wasteful number, since it uses less digits than its factorization.

3868636872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161193212 (or 161193208 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 57.

The square root of 3868636872 is about 62198.3671168303. The cubic root of 3868636872 is about 1569.8301129277.

The spelling of 3868636872 in words is "three billion, eight hundred sixty-eight million, six hundred thirty-six thousand, eight hundred seventy-two".