3138387812 has 48 divisors (see below), whose sum is σ = 6632693760. Its totient is φ = 1270238112.

The previous prime is 3138387751. The next prime is 3138387839. The reversal of 3138387812 is 2187838313.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20033 + ... + 81719.

It is an arithmetic number, because the mean of its divisors is an integer number (138181120).

Almost surely, 2^3138387812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3138387812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3316346880).

3138387812 is an abundant number, since it is smaller than the sum of its proper divisors (3494305948).

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

3138387812 is a wasteful number, since it uses less digits than its factorization.

3138387812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61800 (or 61798 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 3138387812 is about 56021.3156932252. The cubic root of 3138387812 is about 1464.0936920589.

The spelling of 3138387812 in words is "three billion, one hundred thirty-eight million, three hundred eighty-seven thousand, eight hundred twelve".