3986406138 has 192 divisors, whose sum is σ = 10093870080. Its totient is φ = 1037836800.

The previous prime is 3986406121. The next prime is 3986406163. The reversal of 3986406138 is 8316046893.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10518033 + ... + 10518411.

It is an arithmetic number, because the mean of its divisors is an integer number (52572240).

Almost surely, 2^3986406138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3986406138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5046935040).

3986406138 is an abundant number, since it is smaller than the sum of its proper divisors (6107463942).

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

3986406138 is a wasteful number, since it uses less digits than its factorization.

3986406138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 3986406138 is about 63137.9928252395. The cubic root of 3986406138 is about 1585.6007684550.

The spelling of 3986406138 in words is "three billion, nine hundred eighty-six million, four hundred six thousand, one hundred thirty-eight".