3186855138 has 8 divisors (see below), whose sum is σ = 6373710288. Its totient is φ = 1062285044.

The previous prime is 3186855131. The next prime is 3186855187. The reversal of 3186855138 is 8315586813.

It is a sphenic number, since it is the product of 3 distinct primes.

3186855138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (3186855131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265571256 + ... + 265571267.

It is an arithmetic number, because the mean of its divisors is an integer number (796713786).

Almost surely, 2^3186855138 is an apocalyptic number.

3186855138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3186855138 is a wasteful number, since it uses less digits than its factorization.

3186855138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531142528.

The product of its digits is 691200, while the sum is 48.

The square root of 3186855138 is about 56452.2376704414. The cubic root of 3186855138 is about 1471.5920767428.

The spelling of 3186855138 in words is "three billion, one hundred eighty-six million, eight hundred fifty-five thousand, one hundred thirty-eight".