3986487648 has 144 divisors (see below), whose sum is σ = 13318630416. Its totient is φ = 1115089920.

The previous prime is 3986487643. The next prime is 3986487649. The reversal of 3986487648 is 8467846893.

3986487648 is a `hidden beast` number, since 3 + 98 + 6 + 487 + 64 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986487643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7215 + ... + 89582.

It is an arithmetic number, because the mean of its divisors is an integer number (92490489).

Almost surely, 2^3986487648 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 3986487648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6659315208).

3986487648 is an abundant number, since it is smaller than the sum of its proper divisors (9332142768).

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

3986487648 is a wasteful number, since it uses less digits than its factorization.

3986487648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96837 (or 96826 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The square root of 3986487648 is about 63138.6383128430. The cubic root of 3986487648 is about 1585.6115753015.

The spelling of 3986487648 in words is "three billion, nine hundred eighty-six million, four hundred eighty-seven thousand, six hundred forty-eight".