3986537620 has 144 divisors (see below), whose sum is σ = 9420945408. Its totient is φ = 1415232000.

The previous prime is 3986537609. The next prime is 3986537663. The reversal of 3986537620 is 267356893.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 15882495 + ... + 15882745.

It is an arithmetic number, because the mean of its divisors is an integer number (65423232).

Almost surely, 2^3986537620 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 3986537620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4710472704).

3986537620 is an abundant number, since it is smaller than the sum of its proper divisors (5434407788).

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

3986537620 is a wasteful number, since it uses less digits than its factorization.

3986537620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The square root of 3986537620 is about 63139.0340439256. The cubic root of 3986537620 is about 1585.6182006701.

The spelling of 3986537620 in words is "three billion, nine hundred eighty-six million, five hundred thirty-seven thousand, six hundred twenty".