3856986804 has 72 divisors (see below), whose sum is σ = 9918561184. Its totient is φ = 1165665600.

The previous prime is 3856986769. The next prime is 3856986823. The reversal of 3856986804 is 4086896583.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 573099 + ... + 579789.

Almost surely, 2^3856986804 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 3856986804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4959280592).

3856986804 is an abundant number, since it is smaller than the sum of its proper divisors (6061574380).

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

3856986804 is a wasteful number, since it uses less digits than its factorization.

3856986804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7117 (or 7104 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 57.

The square root of 3856986804 is about 62104.6439809456. The cubic root of 3856986804 is about 1568.2527255812.

The spelling of 3856986804 in words is "three billion, eight hundred fifty-six million, nine hundred eighty-six thousand, eight hundred four".